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      <title>DRESP1</title>
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      <div class="title_refTopic" id="xps10_pagetitle">DRESP1 </div>
      <hr noshade="true">
      <h4 class="refClassification">Design Sensitivity Response Quantities </h4>
      <p class="para_refTopic">Defines a set of structural responses that is used in the design either as constraints or as an objective. </p>
      <div class="title_refCategory">Format: </div>
      <div class="refCategoryContent">
         <table border="1" width="100%" align="center">
            <colgroup span="1">
               <col span="1" width="11.36*">
               <col span="1" width="8.76*">
               <col span="1" width="11.16*">
               <col span="1" width="9.96*">
               <col span="1" width="9.96*">
               <col span="1" width="12.16*">
               <col span="1" width="9.96*">
               <col span="1" width="9.96*">
               <col span="1" width="8.96*">
               <col span="1" width="7.76*">
            </colgroup>
            <thead>
               <tr>
                  <th align="center" colspan="1" rowspan="1">
                     <p class="para_th">1 </p>
                  </th>
                  <th align="center" colspan="1" rowspan="1">
                     <p class="para_th">2 </p>
                  </th>
                  <th align="center" colspan="1" rowspan="1">
                     <p class="para_th">3 </p>
                  </th>
                  <th align="center" colspan="1" rowspan="1">
                     <p class="para_th">4 </p>
                  </th>
                  <th align="center" colspan="1" rowspan="1">
                     <p class="para_th">5 </p>
                  </th>
                  <th align="center" colspan="1" rowspan="1">
                     <p class="para_th">6 </p>
                  </th>
                  <th align="center" colspan="1" rowspan="1">
                     <p class="para_th">7 </p>
                  </th>
                  <th align="center" colspan="1" rowspan="1">
                     <p class="para_th">8 </p>
                  </th>
                  <th align="center" colspan="1" rowspan="1">
                     <p class="para_th">9 </p>
                  </th>
                  <th align="center" colspan="1" rowspan="1">
                     <p class="para_th">10 </p>
                  </th>
               </tr>
            </thead>
            <tbody>
               <tr>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">DRESP1 </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">ID </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">LABEL </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">RTYPE </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">PTYPE </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">REGION </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">ATTA </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">ATTB </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">ATT1 </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">&nbsp; </p>
                  </td>
               </tr>
               <tr>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">&nbsp; </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">ATT2 </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">-etc.- </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">&nbsp; </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">&nbsp; </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">&nbsp; </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">&nbsp; </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">&nbsp; </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">&nbsp; </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">&nbsp; </p>
                  </td>
               </tr>
            </tbody>
         </table><br></div>
      <div class="title_refCategory"></div>
      <div class="refCategoryContent">
         <table border="1" width="100%" align="center">
            <colgroup span="1">
               <col span="1" width="11.29*">
               <col span="1" width="9.90*">
               <col span="1" width="9.90*">
               <col span="1" width="11.09*">
               <col span="1" width="9.90*">
               <col span="1" width="9.90*">
               <col span="1" width="9.90*">
               <col span="1" width="9.90*">
               <col span="1" width="9.90*">
               <col span="1" width="8.31*">
            </colgroup>
            <tbody>
               <tr>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">DRESP1 </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">1 </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">DX1 </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">STRESS </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">PROD </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">2 </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">3 </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">&nbsp; </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">102 </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">&nbsp; </p>
                  </td>
               </tr>
               <tr>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">&nbsp; </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">103 </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">&nbsp; </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">&nbsp; </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">&nbsp; </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">&nbsp; </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">&nbsp; </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">&nbsp; </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">&nbsp; </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">&nbsp; </p>
                  </td>
               </tr>
            </tbody>
         </table><br></div>
      <div class="title_refCategory">Fields:</div>
      <div class="refCategoryContent">
         <table cellpadding="10" width="100%" align="center">
            <colgroup span="1">
               <col span="1" width="18.67*">
               <col span="1" width="81.33*">
            </colgroup>
            <thead>
               <tr>
                  <th align="left" colspan="1" rowspan="1">
                     <p class="para_th"><b class="uiTerm">Field </b></p>
                  </th>
                  <th align="left" colspan="1" rowspan="1">
                     <p class="para_th"><b class="uiTerm">Contents </b></p>
                  </th>
               </tr>
            </thead>
            <tbody>
               <tr>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">ID </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Unique entry identifier.  (Integer&gt;0) </p>
                  </td>
               </tr>
               <tr>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">LABEL </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">User-defined label.  (Character) </p>
                  </td>
               </tr>
               <tr>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">RTYPE </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Response type.  See <a class="links" href="javascript:void(0)" onclick="top.openFile('QRG/15topic_23.html#ref59831');return(false);">Table 14-5</a>.  (Character) 
                     </p>
                  </td>
               </tr>
               <tr>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">PTYPE </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Element flag (PTYPE = &ldquo;ELEM&rdquo;) or property entry name.  Used with element type responses (stress, strain, force, etc.) to identify the property type, since property entry IDs are not unique across property types.  (Character:  &ldquo;ELEM&rdquo;, &ldquo;PBAR&rdquo;, &ldquo;PSHELL&rdquo;, etc.) </p>
                  </td>
               </tr>
               <tr>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">REGION </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Region identifier for constraint screening.  See Remark <a class="links" href="javascript:void(0)" onclick="top.openFile('QRG/15topic_23.html#ref29239');return(false);">28-10. </a> for defaults.  (Integer&gt;0) 
                     </p>
                  </td>
               </tr>
               <tr>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">ATTA, ATTB, ATTi </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Response attributes.  See <a class="links" href="javascript:void(0)" onclick="top.openFile('QRG/15topic_23.html#ref59831');return(false);">Table 14-5</a>.  (Integer&gt;0 or Real or blank) 
                     </p>
                  </td>
               </tr>
            </tbody>
         </table><br><a name="ref59831"></a><div class="title_tableWrapper">Table 14-5. Design Sensitivity Response Attributes </div>
         <table border="1" cellpadding="7" width="100%" align="center">
            <colgroup span="1">
               <col span="1" width="12*">
               <col span="1" width="20*">
               <col span="1" width="24*">
               <col span="1" width="27*">
            </colgroup>
            <thead>
               <tr>
                  <th align="center" colspan="1" rowspan="2">
                     <p class="para_th"><b class="uiTerm">Response Type (RTYPE) </b></p>
                  </th>
                  <th align="center" colspan="3" rowspan="1">
                     <p class="para_th"><b class="uiTerm">Response Attributes </b></p>
                  </th>
               </tr>
               <tr>
                  <th align="center" colspan="1" rowspan="1">
                     <p class="para_th"><b class="uiTerm">ATTA (Integer&gt;0) </b></p>
                  </th>
                  <th align="center" colspan="1" rowspan="1">
                     <p class="para_th"><b class="uiTerm">ATTB (Integer&gt;0 or Real&gt;0.0) </b></p>
                  </th>
                  <th align="center" colspan="1" rowspan="1">
                     <p class="para_th"><b class="uiTerm">ATTI (Integer&gt;0) </b></p>
                  </th>
               </tr>
            </thead>
            <tbody>
               <tr>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">WEIGHT </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Row Number </p>
                     <p class="para_td">(1 &le; ROW &le; 6) </p>
                     <p class="para_td">See Remark <a class="links" href="javascript:void(0)" onclick="top.openFile('QRG/15topic_23.html#ref82085');return(false);">28-25. </a></p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Column Number </p>
                     <p class="para_td">(1 &le; COL &le; 6) </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">SEIDi or All or blank </p>
                  </td>
               </tr>
               <tr>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">VOLUME </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Blank </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Blank </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">SEIDi or ALL </p>
                  </td>
               </tr>
               <tr>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">EIGN </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Normal Modes Mode Number </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Approximation Code See Remark <a class="links" href="javascript:void(0)" onclick="top.openFile('QRG/15topic_23.html#refdresp119');return(false);">28-19. </a></p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Blank </p>
                  </td>
               </tr>
               <tr>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">CEIG </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Complex Eigenvalue Mode Number (Integer&gt;0) </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">ALPHA or OMEGA (Default=ALPHA) </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Blank </p>
                  </td>
               </tr>
               <tr>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">FREQ </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Normal Modes Mode Number </p>
                     <p class="para_td">See Remark <a class="links" href="javascript:void(0)" onclick="top.openFile('QRG/15topic_23.html#ref18861a');return(false);">28-18. </a></p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Approximation Code See Remark <a class="links" href="javascript:void(0)" onclick="top.openFile('QRG/15topic_23.html#refdresp119');return(false);">28-19. </a></p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Blank </p>
                  </td>
               </tr>
               <tr>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">LAMA </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Buckling Mode Number </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Approximation Code See Remark <a class="links" href="javascript:void(0)" onclick="top.openFile('QRG/15topic_23.html#refdresp119');return(false);">28-19. </a></p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Blank </p>
                  </td>
               </tr>
               <tr>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">DISP </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Displacement Component </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Blank </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Grid ID </p>
                  </td>
               </tr>
               <tr>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">STRAIN </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Strain Item Code </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Blank </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Property entry (PID) </p>
                  </td>
               </tr>
               <tr>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">ESE </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Strain Energy Item Code </p>
                     <p class="para_td">See Remark <a class="links" href="javascript:void(0)" onclick="top.openFile('QRG/15topic_23.html#ref63900');return(false);">28-21. </a></p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Blank </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Property entry (PID) </p>
                  </td>
               </tr>
               <tr>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">STRESS </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Stress Item Code </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Blank </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Property entry (PID) </p>
                  </td>
               </tr>
               <tr>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">FORCE </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Force Item Code </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Blank </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Property entry (PID) </p>
                  </td>
               </tr>
               <tr>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">SPCFORCE </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">SPC Force Component </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Blank </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Grid ID </p>
                  </td>
               </tr>
               <tr>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">CSTRAIN </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Strain Item Code </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">LAMINA Number </p>
                     <p class="para_td">(Integer; Default = 1) </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Property entry (PID) </p>
                  </td>
               </tr>
               <tr>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">CSTRESS </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Stress Item Code </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">LAMINA Number </p>
                     <p class="para_td">(Integer; Default = 1) </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Property entry (PID) </p>
                  </td>
               </tr>
               <tr>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">CFAILURE </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Failure Criterion Item Code </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">LAMINA Number </p>
                     <p class="para_td">(Integer; Default = 1) </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Property entry (PID) </p>
                  </td>
               </tr>
               <tr>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">FRACCL </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Acceleration Component </p>
                     <p class="para_td">See Remarks <a class="links" href="javascript:void(0)" onclick="top.openFile('QRG/15topic_23.html#dresp1_8');return(false);">28-8 </a> and <a class="links" href="javascript:void(0)" onclick="top.openFile('QRG/15topic_23.html#dresp1_9');return(false);">28-9. </a></p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Frequency Value (Blank, Real&gt;0.0 or Character)  See Remarks <a class="links" href="javascript:void(0)" onclick="top.openFile('QRG/15topic_23.html#ref30363a');return(false);">28-15 </a> and <a class="links" href="javascript:void(0)" onclick="top.openFile('QRG/15topic_23.html#ref51555');return(false);">28-20. </a></p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Grid ID </p>
                  </td>
               </tr>
               <tr>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">FRDISP </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Displacement Component</p>
                     <p class="para_td"> See Remarks <a class="links" href="javascript:void(0)" onclick="top.openFile('QRG/15topic_23.html#dresp1_8');return(false);">28-8 </a> and <a class="links" href="javascript:void(0)" onclick="top.openFile('QRG/15topic_23.html#dresp1_9');return(false);">28-9. </a></p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Frequency Value (Blank, Real&gt;0.0 or Character)  See Remarks <a class="links" href="javascript:void(0)" onclick="top.openFile('QRG/15topic_23.html#ref30363a');return(false);">28-15 </a> and <a class="links" href="javascript:void(0)" onclick="top.openFile('QRG/15topic_23.html#ref51555');return(false);">28-20. </a></p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Grid ID </p>
                  </td>
               </tr>
               <tr>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">PRES </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Acoustic Pressure Component </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Frequency Value (Real&gt;0.0) See Remark <a class="links" href="javascript:void(0)" onclick="top.openFile('QRG/15topic_23.html#ref30363a');return(false);">28-15. </a></p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Grid ID </p>
                  </td>
               </tr>
               <tr>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">FRFORC </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Force Item Code </p>
                     <p class="para_td">See Remarks <a class="links" href="javascript:void(0)" onclick="top.openFile('QRG/15topic_23.html#dresp1_8');return(false);">28-8 </a> and <a class="links" href="javascript:void(0)" onclick="top.openFile('QRG/15topic_23.html#dresp1_9');return(false);">28-9. </a></p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Frequency Value (Blank or Real&gt;0.0)  See Remark <a class="links" href="javascript:void(0)" onclick="top.openFile('QRG/15topic_23.html#ref30363a');return(false);">28-15 </a>.
                     </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Property entry (PID) </p>
                  </td>
               </tr>
               <tr>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">FRSPCF </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">SPC Force Component </p>
                     <p class="para_td">See Remarks <a class="links" href="javascript:void(0)" onclick="top.openFile('QRG/15topic_23.html#dresp1_8');return(false);">28-8 </a> and <a class="links" href="javascript:void(0)" onclick="top.openFile('QRG/15topic_23.html#dresp1_9');return(false);">28-9. </a></p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Frequency Value (Blank, Real&gt;0.0 or Character)  See Remarks <a class="links" href="javascript:void(0)" onclick="top.openFile('QRG/15topic_23.html#ref30363a');return(false);">28-15 </a> and <a class="links" href="javascript:void(0)" onclick="top.openFile('QRG/15topic_23.html#ref51555');return(false);">28-20. </a></p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Grid ID </p>
                  </td>
               </tr>
               <tr>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">FRSTRE </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Stress Item Code </p>
                     <p class="para_td">See Remarks <a class="links" href="javascript:void(0)" onclick="top.openFile('QRG/15topic_23.html#dresp1_8');return(false);">28-8 </a> and <a class="links" href="javascript:void(0)" onclick="top.openFile('QRG/15topic_23.html#dresp1_9');return(false);">28-9. </a></p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Frequency Value.  (Blank or Real&gt;0.0)  See Remark <a class="links" href="javascript:void(0)" onclick="top.openFile('QRG/15topic_23.html#ref30363a');return(false);">28-15 </a>. 
                     </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Property entry (PID) </p>
                  </td>
               </tr>
               <tr>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">FRVELO </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Velocity Component</p>
                     <p class="para_td">See Remarks <a class="links" href="javascript:void(0)" onclick="top.openFile('QRG/15topic_23.html#dresp1_8');return(false);">28-8 </a> and <a class="links" href="javascript:void(0)" onclick="top.openFile('QRG/15topic_23.html#dresp1_9');return(false);">28-9. </a></p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Frequency Value.  (Blank, Real&gt;0.0 or Character)  See Remarks <a class="links" href="javascript:void(0)" onclick="top.openFile('QRG/15topic_23.html#ref30363a');return(false);">28-15 </a> and <a class="links" href="javascript:void(0)" onclick="top.openFile('QRG/15topic_23.html#ref51555');return(false);">28-20. </a></p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Grid ID </p>
                  </td>
               </tr>
               <tr>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">RMSDISP </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Displacement Component </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">RANDPS ID </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Grid ID </p>
                  </td>
               </tr>
               <tr>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">RMSVELO </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Velocity Component </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">RANDPS ID </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Grid ID </p>
                  </td>
               </tr>
               <tr>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">RMSACCL </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Acceleration Component </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">RANDPS ID </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Grid ID </p>
                  </td>
               </tr>
               <tr>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">TDISP </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Displacement Component </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Time Value (Blank, Real, or Character)  See Remarks <a class="links" href="javascript:void(0)" onclick="top.openFile('QRG/15topic_23.html#ref83341');return(false);">28-16</a> and <a class="links" href="javascript:void(0)" onclick="top.openFile('QRG/15topic_23.html#ref51555');return(false);">28-20. </a></p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Grid ID </p>
                  </td>
               </tr>
               <tr>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">TVELO </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Velocity Component </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Time Value (Blank, Real, or Character)  See Remarks <a class="links" href="javascript:void(0)" onclick="top.openFile('QRG/15topic_23.html#ref83341');return(false);">28-16</a> and <a class="links" href="javascript:void(0)" onclick="top.openFile('QRG/15topic_23.html#ref51555');return(false);">28-20. </a></p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Grid ID </p>
                  </td>
               </tr>
               <tr>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">TACCL </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Acceleration Component </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Time Value (Blank, Real, or Character)  See Remarks <a class="links" href="javascript:void(0)" onclick="top.openFile('QRG/15topic_23.html#ref83341');return(false);">28-16</a> and <a class="links" href="javascript:void(0)" onclick="top.openFile('QRG/15topic_23.html#ref51555');return(false);">28-20. </a></p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Grid ID </p>
                  </td>
               </tr>
               <tr>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">TSPCF </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">SPC Force Component </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Time Value.  (Blank, Real, or Character)  See Remarks <a class="links" href="javascript:void(0)" onclick="top.openFile('QRG/15topic_23.html#ref83341');return(false);">28-16</a> and <a class="links" href="javascript:void(0)" onclick="top.openFile('QRG/15topic_23.html#ref51555');return(false);">28-20. </a></p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Grid ID </p>
                  </td>
               </tr>
               <tr>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">TSTRE </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Stress Item Code </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Time Value.  (Blank or Real&gt;0.0)  See Remark <a class="links" href="javascript:void(0)" onclick="top.openFile('QRG/15topic_23.html#ref83341');return(false);">28-16</a>. 
                     </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Property entry (PID) </p>
                  </td>
               </tr>
               <tr>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">TFORC </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Force Item Code </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Time Value.  (Blank or Real&gt;0.0)  See Remark <a class="links" href="javascript:void(0)" onclick="top.openFile('QRG/15topic_23.html#ref83341');return(false);">28-16</a>.
                     </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Property entry (PID) </p>
                  </td>
               </tr>
               <tr>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">TRIM </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">AESTAT or AESURF Entry ID </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Blank </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Blank </p>
                  </td>
               </tr>
               <tr>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">STABDER </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">AESTAT or AESURF Entry ID </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Restraint Flag. (Integer 0 or 1)  See Remark <a class="links" href="javascript:void(0)" onclick="top.openFile('QRG/15topic_23.html#ref52447');return(false);">28-13. </a></p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Component </p>
                  </td>
               </tr>
               <tr>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">FLUTTER </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Blank </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Blank </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">See Remark <a class="links" href="javascript:void(0)" onclick="top.openFile('QRG/15topic_23.html#remark14');return(false);">28-14. </a></p>
                  </td>
               </tr>
            </tbody>
         </table><br></div>
      <div class="title_refCategory">Remarks: </div>
      <div class="refCategoryContent">
         <ol type="1" start="1">
            <li>
               <p class="para_item">Stress, strain, and force item codes can be found in <a class="links" href="javascript:void(0)" onclick="top.openFile('QRG/09ref75809_1.html');return(false);">&ldquo;Item Codes&rdquo;</a>.  For stress or strain item codes that have dual meanings, such as von Mises or maximum shear, the option specified in the Case Control Section will be used; i.e., STRESS(VONM) or STRESS(MAXS). 
               </p>
            </li>
            <li>
               <p class="para_item">RTYPE = &ldquo;CSTRESS&rdquo;, &ldquo;CSTRAIN&rdquo;, and &ldquo;CFAILURE&rdquo; are used only with the PCOMP entry.  &ldquo;CSTRESS&rdquo; and &ldquo;CSTRAIN&rdquo; item codes are described under Table 1 (Element Stress/Strain Item Codes) in <a class="links" href="javascript:void(0)" onclick="top.openFile('QRG/09ref75809_1.html');return(false);">&ldquo;Item Codes&rdquo;</a>.  &ldquo;CFAILURE&rdquo; item codes are described under Table 2 (Element Force Item Codes) in <a class="links" href="javascript:void(0)" onclick="top.openFile('QRG/09ref75809_1.html');return(false);">&ldquo;Item Codes&rdquo;</a>.  Only force item codes that refer to failure indices of direct stress and interlaminar shear stress are valid. 
               </p>
               <p class="para_item">The CFAILURE response type requires the following specifications on the applicable entries: </p>
               <ul>
                  <li>
                     <p class="para_item">Failure theory in the FT field on PCOMP entry. </p>
                  </li>
                  <li>
                     <p class="para_item">Allowable bonding shear stress in the SB field on PCOMP entry. </p>
                  </li>
                  <li>
                     <p class="para_item">Stress limits in the ST, SC, and SS fields on all MATi entries. </p>
                  </li>
               </ul>
            </li>
            <li>
               <p class="para_item">ATTB is used only for responses of composite laminae, dynamics, complex eigenvalue, and stability derivatives.  For other responses, this field must be blank. </p>
            </li>
            <li>
               <p class="para_item">All grids associated with a DRESP1 entry are considered to be in the same region for screening purposes.  Only up to NSTR displacement constraints (see DSCREEN entry) per group per load case will be retained in the design optimization phase. </p>
            </li>
            <li>
               <p class="para_item">DRESP1 identification numbers must be unique with respect to DRESP2 identification numbers. </p>
            </li>
            <li>
               <p class="para_item">If PTYPE = &ldquo;ELEM&rdquo;, the ATTi correspond to element identification numbers. </p>
            </li>
            <li>
               <p class="para_item">If RTYPE = &ldquo;DISP&rdquo;, &ldquo;TDISP&rdquo;, &ldquo;TVELO&rdquo;, &ldquo;TACCL&rdquo;, &ldquo;TSPCF&rdquo;, &ldquo;TFORC&rdquo; or &ldquo;TSTRE&rdquo;, multiple component numbers (any unique combination of the digits 1 through 6 with no embedded blanks) may be specified on a single entry.  Multiple response components may not be used on any other response types. </p>
            </li>
            <li><a name="dresp1_8"></a><p class="para_item">If RTYPE = &ldquo;FRDISP&rdquo;, &ldquo;FRVELO&rdquo;, &ldquo;FRACCL&rdquo;, &ldquo;FRSPCF&rdquo;, &ldquo;FRFORC&rdquo; or &ldquo;FRSTRE&rdquo;, only one component number may be specified in the ATTA field.  Numbers 1 through 6 correspond to real (or magnitude) components and 7 through 12 imaginary (or phase) components.  If more than one component for the same grid is desired, then a separate entry is required.</p>
               <p class="para_item">Note that, in case the response is used for a constraint, the choice of response computation format (real/imaginary vs. magnitude/phase) will affect constraint values.  See also Remark 9.</p>
            </li>
            <li><a name="dresp1_9"></a><p class="para_item">Real/imaginary representation is the default for complex response types.  Magnitude/phase representation must be requested by the corresponding Case Control command; e.g., DlSP(PHASE) = ALL. </p>
            </li>
            <li><a name="ref29239"></a><p class="para_item">REGION is used for constraint screening.  The NSTR field on DSCREEN entries gives the maximum number of constraints retained for each region per load case. </p>
               <p class="para_item">IF RTYPE = &ldquo;WEIGHT&rdquo;, &ldquo;VOLUME&rdquo;, &ldquo;LAMA&rdquo;, &ldquo;EIGN&rdquo; or &ldquo;FREQ&rdquo;, no REGION identification number should be specified.  For all other responses, if the REGION field is left blank, the default specified in <a class="links" href="javascript:void(0)" onclick="top.openFile('QRG/15topic_23.html#ref33658');return(false);">Table 14-6</a> is used.  Usually, the default value is appropriate. 
               </p>
               <p class="para_item">If the REGION field is not blank, all the responses on this entry as well as all responses on other DRESP1 entries that have the same RTYPE and REGION identification number will be grouped into the same region. </p><a name="ref33658"></a><div class="title_tableWrapper">Table 14-6. Default Regions for Design Sensitivity Response Types </div>
               <table border="1" cellpadding="8" width="100%" align="center">
                  <colgroup span="1">
                     <col span="1" width="33.96*">
                     <col span="1" width="66.04*">
                  </colgroup>
                  <thead>
                     <tr>
                        <th align="center" colspan="1" rowspan="1">
                           <p class="para_th"><b class="uiTerm">Response Type </b></p>
                        </th>
                        <th align="center" colspan="1" rowspan="1">
                           <p class="para_th"><b class="uiTerm">Default Region </b></p>
                        </th>
                     </tr>
                  </thead>
                  <tbody>
                     <tr>
                        <td align="left" colspan="1" rowspan="1" valign="top">
                           <p class="para_td">WEIGHT </p>
                        </td>
                        <td align="left" colspan="1" rowspan="1" valign="top">
                           <p class="para_td">No region </p>
                        </td>
                     </tr>
                     <tr>
                        <td align="left" colspan="1" rowspan="1" valign="top">
                           <p class="para_td">VOLUME </p>
                        </td>
                        <td align="left" colspan="1" rowspan="1" valign="top">
                           <p class="para_td">No region </p>
                        </td>
                     </tr>
                     <tr>
                        <td align="left" colspan="1" rowspan="1" valign="top">
                           <p class="para_td">LAMA </p>
                        </td>
                        <td align="left" colspan="1" rowspan="1" valign="top">
                           <p class="para_td">No region </p>
                        </td>
                     </tr>
                     <tr>
                        <td align="left" colspan="1" rowspan="1" valign="top">
                           <p class="para_td">EIGN </p>
                        </td>
                        <td align="left" colspan="1" rowspan="1" valign="top">
                           <p class="para_td">No region </p>
                        </td>
                     </tr>
                     <tr>
                        <td align="left" colspan="1" rowspan="1" valign="top">
                           <p class="para_td">FREQ </p>
                        </td>
                        <td align="left" colspan="1" rowspan="1" valign="top">
                           <p class="para_td">No region </p>
                        </td>
                     </tr>
                     <tr>
                        <td align="left" colspan="1" rowspan="1" valign="top">
                           <p class="para_td">DISP </p>
                        </td>
                        <td align="left" colspan="1" rowspan="1" valign="top">
                           <p class="para_td">One region per DRESP1 entry </p>
                        </td>
                     </tr>
                     <tr>
                        <td align="left" colspan="1" rowspan="1" valign="top">
                           <p class="para_td">FRDISP </p>
                        </td>
                        <td align="left" colspan="1" rowspan="1" valign="top">
                           <p class="para_td">One region per DRESP1 entry </p>
                        </td>
                     </tr>
                     <tr>
                        <td align="left" colspan="1" rowspan="1" valign="top">
                           <p class="para_td">PRES </p>
                        </td>
                        <td align="left" colspan="1" rowspan="1" valign="top">
                           <p class="para_td">One region per DRESP1 entry </p>
                        </td>
                     </tr>
                     <tr>
                        <td align="left" colspan="1" rowspan="1" valign="top">
                           <p class="para_td">SPCFORCE </p>
                        </td>
                        <td align="left" colspan="1" rowspan="1" valign="top">
                           <p class="para_td">One region per DRESP1 entry </p>
                        </td>
                     </tr>
                     <tr>
                        <td align="left" colspan="1" rowspan="1" valign="top">
                           <p class="para_td">FRVELO </p>
                        </td>
                        <td align="left" colspan="1" rowspan="1" valign="top">
                           <p class="para_td">One region per DRESP1 entry </p>
                        </td>
                     </tr>
                     <tr>
                        <td align="left" colspan="1" rowspan="1" valign="top">
                           <p class="para_td">FRACCL </p>
                        </td>
                        <td align="left" colspan="1" rowspan="1" valign="top">
                           <p class="para_td">One region per DRESP1 entry </p>
                        </td>
                     </tr>
                     <tr>
                        <td align="left" colspan="1" rowspan="1" valign="top">
                           <p class="para_td">FRSPCF </p>
                        </td>
                        <td align="left" colspan="1" rowspan="1" valign="top">
                           <p class="para_td">One region per DRESP1 entry </p>
                        </td>
                     </tr>
                     <tr>
                        <td align="left" colspan="1" rowspan="1" valign="top">
                           <p class="para_td">TDISP </p>
                        </td>
                        <td align="left" colspan="1" rowspan="1" valign="top">
                           <p class="para_td">One region per DRESP1 entry </p>
                        </td>
                     </tr>
                     <tr>
                        <td align="left" colspan="1" rowspan="1" valign="top">
                           <p class="para_td">TVELO </p>
                        </td>
                        <td align="left" colspan="1" rowspan="1" valign="top">
                           <p class="para_td">One region per DRESP1 entry </p>
                        </td>
                     </tr>
                     <tr>
                        <td align="left" colspan="1" rowspan="1" valign="top">
                           <p class="para_td">TACCL </p>
                        </td>
                        <td align="left" colspan="1" rowspan="1" valign="top">
                           <p class="para_td">One region per DRESP1 entry </p>
                        </td>
                     </tr>
                     <tr>
                        <td align="left" colspan="1" rowspan="1" valign="top">
                           <p class="para_td">TSPCF </p>
                        </td>
                        <td align="left" colspan="1" rowspan="1" valign="top">
                           <p class="para_td">One region per DRESP1 entry </p>
                        </td>
                     </tr>
                     <tr>
                        <td align="left" colspan="1" rowspan="1" valign="top">
                           <p class="para_td">FLUTTER </p>
                        </td>
                        <td align="left" colspan="1" rowspan="1" valign="top">
                           <p class="para_td">One region per DRESP1 entry </p>
                        </td>
                     </tr>
                     <tr>
                        <td align="left" colspan="1" rowspan="1" valign="top">
                           <p class="para_td">OTHER </p>
                        </td>
                        <td align="left" colspan="1" rowspan="1" valign="top">
                           <p class="para_td">One region per PROPERTY entry.  If PTYPE = &ldquo;ELEM&rdquo;, then one region per DRESP1 entry </p>
                        </td>
                     </tr>
                  </tbody>
               </table><br></li>
            <li>
               <p class="para_item">REGION is valid only among the same type of responses.  Responses of different types will never be grouped into the same region, even if they are assigned the same REGION identification number by the user. </p>
            </li>
            <li>
               <p class="para_item">If RTYPE = &ldquo;WEIGHT&rdquo; or &ldquo;VOLUME&rdquo;, field ATTi = &ldquo;ALL&rdquo; implies total weight/volume of all superelements except external superelements. </p>
            </li>
            <li><a name="ref52447"></a><p class="para_item">RTYPE = &ldquo;STABDER&rdquo; identifies a stability derivative response.  ATTB is the restraint flag for the stability derivative.  ATTB = 0 means unrestrained, and ATTB = 1 means restrained.  For example, ATTA = 4000, ATTB = 0, and ATT1 = 3 reference the unrestrained C<sub class="subscript">z</sub> derivative for the AESTAT (or AESURF) entry ID = 4000. 
               </p>
            </li>
            <li><a name="remark14"></a><p class="para_item">RTYPE = &ldquo;FLUTTER&rdquo; identifies a set of damping responses.  The set is specified by ATTi: </p>
               <p class="para_item">ATT1 = Identification number of a SET1 entry that specifies a set of modes. </p>
               <p class="para_item">ATT2 = Identification number of an FLFACT entry that specifies a list of densities. </p>
               <p class="para_item">ATT3 = Identification number of an FLFACT entry that specifies a list of Mach numbers. </p>
               <p class="para_item">ATT4 = Identification number of an FLFACT entry that specifies a list of velocities. </p>
               <p class="para_item">If the flutter analysis is type PKNL, it is necessary to put PKNL in the PTYPE field of this entry. </p>
            </li>
            <li><a name="ref30363a"></a><p class="para_item">For RTYPE = &ldquo;FRDISP&rdquo;, &ldquo;FRVELO&rdquo;, &ldquo;FRACCL&rdquo;, &ldquo;FRSPCF&rdquo;, &ldquo;FRFORC&rdquo;, and &ldquo;FRSTRE&rdquo;, a real value for ATTB specifies a frequency value in cycles per unit time.  If ATTB is specified, then the responses are evaluated at the closest frequency selected by the OFREQ command.  The default for ATTB is all frequencies selected by the OFREQ command. See Remark <a class="links" href="javascript:void(0)" onclick="top.openFile('QRG/15topic_23.html#ref51555');return(false);">28-20. </a> for additional ATTB options. 
               </p>
            </li>
            <li><a name="ref83341"></a><p class="para_item">For RTYPE = &ldquo;TDISP&rdquo;, &ldquo;TVELO&rdquo;, &ldquo;TACCL&rdquo;, &ldquo;TSPCF&rdquo;, &ldquo;TFORC&rdquo;, and &ldquo;TSTRE&rdquo;, ATTB specifies a time value.  If ATTB is specified, then the responses are evaluated at the closest time selected by the OTIME command.  The default for ATTB is all time steps selected by the OTIME command. </p>
            </li>
            <li>
               <p class="para_item">Intermediate station responses on CBAR elements due to PLOAD1 and/or CBARAO entries may not be defined on the DRESP1 entry. </p>
            </li>
            <li><a name="ref18861a"></a><p class="para_item">RTYPE = &ldquo;EIGN&rdquo; refers to normal modes response in terms of eigenvalue (radian/time)<sub class="subscript">**</sub>2 while RTYPE = &ldquo;FREQ&rdquo; refers to normal modes response in terms of natural frequency or units of cycles per unit time. 
               </p>
            </li>
            <li><a name="refdresp119"></a><p class="para_item">For RTYPE = LAMA, EIGN or FREQ, the response approximation used for optimization can be individually selected using the ATTB field.  (Approximation Code = 1 = direct linearization, = 2 = Inverse Linearization). </p>
            </li>
            <li><a name="ref51555"></a><p class="para_item">Character input for ATTB is available for RTYPE of FRDISP, FRVELO, FRACCL, FRSPCF, TDISP, TVELO, TACCL, and TSPCF. The character input represents a mathematical function and the options for character input are SUM, AVG, SSQ, RSS, MAX and MIN. The expression of mathematical function is shown as follows:</p>
               <p class="para_item"><img align="bottom" src="graphics/bulkde_dresp1_remark20.gif" border="0"></p>
               <p class="para_item">MAX (X<sub class="subscript">1</sub>, X<sub class="subscript">2</sub>, ..., X<sub class="subscript">n</sub>) = Largest value among X<sub class="subscript">i</sub> (i=1 to n)
               </p>
               <p class="para_item">MIN (X<sub class="subscript">1</sub>, X<sub class="subscript">2</sub>, ..., X<sub class="subscript">n</sub>) = Smallest value among X<sub class="subscript">i</sub> (i=1 to n)
               </p>
               <p class="para_item">where X<sub class="subscript">i</sub> is the response for a forcing frequency. For example 
               </p>
               <p class="para_item">DRESP1,10,DX1,FRSTRE,ELEM,,3,AVG,10 </p>
               <p class="para_item">yields a response which is equal to the average stress for element 10. The average is done by first adding up the component 3 stress of element 10 for all forcing frequencies (all time steps for transient response), and then dividing by the number of forcing frequencies. Note that the response computed is considered as type 2 response. Therefore, if referenced on a DRESP2, the ID of such DRESP1 (ATTB with character input) must be listed following DRESP2 keyword.</p>
            </li>
            <li><a name="ref63900"></a><p class="para_item">Element strain energy item codes can be found in <a class="links" href="javascript:void(0)" onclick="top.openFile('QRG/09ref75809_6.html');return(false);">&ldquo;Element Strain Energy Item Codes&rdquo; </a>. Only element strain energy and element strain energy density can be referenced on a DRESP1 entry. 
               </p>
            </li>
            <li>
               <p class="para_item">For RTYPE=CEIG, the allowable character inputs are ALPHA and OMEGA with ALPHA being the default. </p>
            </li>
            <li>
               <p class="para_item">For RTYPE=RMSDISP, RMSVELO, or RMSACCL the ATTB specifies the appropriate RANDPS ID. </p>
            </li>
            <li>
               <p class="para_item">Input other than 1 or 7 of ATTA field, acoustic pressure component, for PRES response type will be reset to 1 (if less than 7) or 7 (if greater than 7 and less than 13). </p>
            </li>
            <li><a name="ref82085"></a><p class="para_item">Design response weight is obtained from Grid Point Weight Generator for a reference point GRDPNT (see parameter GRDPNT). If GRDPNT is either not defined, equal to zero, or not a defined grid point, the reference point is taken as the origin of the basic coordinate system. Fields ATTA and ATTB refer to the row and column numbers of  the rigid body weight matrix, which is partitioned as follows: </p>
               <p class="para_item"><img align="bottom" src="graphics/bulkde-equ21.gif" border="0"></p>
               <p class="para_item">The default values of ATTA and ATTB are 3, which specifies weight in the Z direction. Field ATT1 = &ldquo;ALL&rdquo; implies total weight of all superelements except external superelements. SEIDi refers to a superelement identification number. SEIDi= &ldquo;0&rdquo; refers to the residual superelement.  The default of ATT1 is blank which is equivalent to &ldquo;ALL&rdquo;. </p>
            </li>
         </ol>
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