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      <title>TLOAD2</title>
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      <div class="title_refTopic" id="xps10_pagetitle">TLOAD2 </div>
      <hr noshade="true">
      <h4 class="refClassification">Transient Response Dynamic Excitation, Form 2 </h4>
      <p class="para_refTopic">Defines a time-dependent dynamic excitation or enforced motion of the form </p>
      <p class="para_refTopic"><img align="bottom" src="graphics/bulktuv-equ42.gif" border="0"></p>
      <p class="para_refTopic">for use in a transient response problem, where </p>
      <p class="para_refTopic"><img align="bottom" src="graphics/bulktuv-equ43.gif" border="0"></p>
      <div class="title_refCategory">Format: </div>
      <div class="refCategoryContent">
         <table border="1" width="100%" align="center">
            <colgroup span="1">
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                     <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">TLOAD2 </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">SID </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">EXCITEID </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">DELAY </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">TYPE </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">T1 </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">T2 </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">F </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">P </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">C </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">B </p>
                  </td>
                  <td align="center" bgcolor="gray" colspan="1" rowspan="1">
                     <p class="para_td">&nbsp; </p>
                  </td>
                  <td align="center" bgcolor="gray" colspan="1" rowspan="1">
                     <p class="para_td">&nbsp; </p>
                  </td>
                  <td align="center" bgcolor="gray" colspan="1" rowspan="1">
                     <p class="para_td">&nbsp; </p>
                  </td>
                  <td align="center" bgcolor="gray" colspan="1" rowspan="1">
                     <p class="para_td">&nbsp; </p>
                  </td>
                  <td align="center" bgcolor="gray" colspan="1" rowspan="1">
                     <p class="para_td">&nbsp; </p>
                  </td>
                  <td align="center" bgcolor="gray" colspan="1" rowspan="1">
                     <p class="para_td">&nbsp; </p>
                  </td>
                  <td align="center" bgcolor="gray" colspan="1" rowspan="1">
                     <p class="para_td">&nbsp; </p>
                  </td>
               </tr>
            </tbody>
         </table><br></div>
      <div class="title_refCategory">Example: </div>
      <div class="refCategoryContent">
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            <tbody>
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                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">TLOAD2 </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">4 </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">10 </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">2.1 </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">4.7 </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">12.0 </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>
               <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">2.0 </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">
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                  <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">SID </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Set identification number.  (Integer &gt; 0) </p>
                  </td>
               </tr>
               <tr>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">EXCITEID </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Identification number of DAREA or SPCD entry set or a thermal load set (in heat transfer analysis) that defines <em>A</em>.  See Remarks <a class="links" href="javascript:void(0)" onclick="top.openFile('QRG/20topic_27.html#ref70474');return(false);">35-2</a> and <a class="links" href="javascript:void(0)" onclick="top.openFile('QRG/20topic_27.html#ref22480');return(false);">35-3. </a> (Integer &gt; 0) 
                     </p>
                  </td>
               </tr>
               <tr>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">DELAY </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Identification number of DELAY entry set that defines &tau;.  (Integer &ge; 0 or blank) </p>
                  </td>
               </tr>
               <tr>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">TYPE </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Defines the type of the dynamic excitation.  See Remarks <a class="links" href="javascript:void(0)" onclick="top.openFile('QRG/20topic_27.html#ref70474');return(false);">35-2</a> and <a class="links" href="javascript:void(0)" onclick="top.openFile('QRG/20topic_27.html#ref22480');return(false);">35-3. </a> (Integer, character or blank; Default=0) 
                     </p>
                  </td>
               </tr>
               <tr>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">T1 </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Time constant.  (Real &ge; 0.0) </p>
                  </td>
               </tr>
               <tr>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">T2 </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Time constant.  (Real; T2 &gt; T1) </p>
                  </td>
               </tr>
               <tr>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">F </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Frequency in cycles per unit time.  (Real &ge; 0.0; Default=0.0) </p>
                  </td>
               </tr>
               <tr>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">P </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Phase angle in degrees.  (Real; Default=0.0) </p>
                  </td>
               </tr>
               <tr>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">C </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Exponential coefficient.  (Real; Default=0.0) </p>
                  </td>
               </tr>
               <tr>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">B </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Growth coefficient.  (Real; Default=0.0) </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">Dynamic excitation sets must be selected with the Case Control command with DLOAD=SID. </p>
            </li>
            <li><a name="ref70474"></a><p class="para_item">The type of the dynamic excitation is specified by TYPE (field 5) according to the following table: </p>
               <table border="1" cellpadding="9" width="100%" align="center">
                  <colgroup span="1">
                     <col span="1" width="33.53*">
                     <col span="1" width="66.47*">
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                  <thead>
                     <tr>
                        <th align="center" colspan="1" rowspan="1">
                           <p class="para_th"><b class="uiTerm">TYPE </b></p>
                        </th>
                        <th align="center" colspan="1" rowspan="1">
                           <p class="para_th"><b class="uiTerm">TYPE of Dynamic Excitation </b></p>
                        </th>
                     </tr>
                  </thead>
                  <tbody>
                     <tr>
                        <td align="left" colspan="1" rowspan="1" valign="top">
                           <p class="para_td">0, L, LO, LOA or LOAD </p>
                        </td>
                        <td align="left" colspan="1" rowspan="1" valign="top">
                           <p class="para_td">Applied load (force or moment) (Default) </p>
                        </td>
                     </tr>
                     <tr>
                        <td align="left" colspan="1" rowspan="1" valign="top">
                           <p class="para_td">1, D, DI, DIS, or DISP </p>
                        </td>
                        <td align="left" colspan="1" rowspan="1" valign="top">
                           <p class="para_td">Enforced displacement using large mass or SPC/SPCD data </p>
                        </td>
                     </tr>
                     <tr>
                        <td align="left" colspan="1" rowspan="1" valign="top">
                           <p class="para_td">2, V, VE, VEL or VELO </p>
                        </td>
                        <td align="left" colspan="1" rowspan="1" valign="top">
                           <p class="para_td">Enforced velocity using large mass or SPC/SPCD data </p>
                        </td>
                     </tr>
                     <tr>
                        <td align="left" colspan="1" rowspan="1" valign="top">
                           <p class="para_td">3, A, AC, ACC or ACCE </p>
                        </td>
                        <td align="left" colspan="1" rowspan="1" valign="top">
                           <p class="para_td">Enforced acceleration using large mass or SPC/SPCD data </p>
                        </td>
                     </tr>
                  </tbody>
               </table><br></li>
            <li><a name="ref22480"></a><p class="para_item">TYPE (field 5) also determines the manner in which EXCITEID (field 3) is used by the program as described below </p>
               <p class="para_item">Excitation specified by TYPE is applied load </p>
               <ul>
                  <li>
                     <p class="para_item">There is no LOADSET request in Case Control </p>
                     <p class="para_item">EXCITEID may also reference DAREA, static and thermal load set entries </p>
                  </li>
                  <li>
                     <p class="para_item">There is a LOADSET request in Case Control </p>
                     <p class="para_item">The program may also reference static and thermal load set entries specified by the LID or TID field in the selected LSEQ entries corresponding to the EXCITEID. </p>
                  </li>
               </ul>
               <p class="para_item">Excitation specified by TYPE is enforced motion </p>
               <ul>
                  <li>
                     <p class="para_item">There is no LOADSET request in Case Control </p>
                     <p class="para_item">EXCITEID will reference SPCD entries. If such entries indicate null enforced motion, the program will then assume that the excitation is enforced motion using large mass and will reference DAREA and static and thermal load set entries just as in the case of applied load excitation. </p>
                  </li>
                  <li>
                     <p class="para_item">There is a LOADSET request in Case Control </p>
                     <p class="para_item">The program will reference SPCD entries specified by the LID field in the selected LSEQ entries corresponding to the EXCITEID. If such entries indicate null enforced motion, the program will then assume that the excitation is enforced motion using large mass and will reference static and thermal load set entries specified by the LID or TID field in the selected LSEQ entries corresponding to the EXCITEID, just as in the case of applied load excitation. </p>
                  </li>
               </ul>
            </li>
            <li>
               <p class="para_item">EXCITEID (field 3) may reference sets containing QHBDY, QBDYi, QVECT, and QVOL entries when using the heat transfer option. </p>
            </li>
            <li>
               <p class="para_item">If DELAY is blank or zero, &tau; will be zero. </p>
            </li>
            <li>
               <p class="para_item">TLOAD1 loads may be combined with TLOAD2 loads only by specification on a DLOAD entry.  That is, the SID on a TLOAD1 entry may not be the same as that on a TLOAD2 entry. </p>
            </li>
            <li>
               <p class="para_item">SID must be unique for all TLOAD1, TLOAD2, RLOAD1, RLOAD2, and ACSRCE entries. </p>
            </li>
            <li>
               <p class="para_item">If the heat transfer option is used, the referenced QVECT entry may also contain references to functions of time, and therefore A may be a function of time. </p>
            </li>
            <li>
               <p class="para_item">If TLOADi entries are selected in SOL 111 or 146 then a Fourier analysis is used to transform the time-dependent loads on the TLOADi entries to the frequency domain and them combine them with loads from RLOADi entries.  Then the analysis is performed as a frequency response analysis but the solution and the output are converted to and printed in the time domain.  In this case, B will be rounded to the nearest integer. Please refer to <a class="links" href="javascript:void(0)" onclick="top.popUpPage('QRG/linkInter_target_not_resolved.html#adv_dyn:ref22295:-aux,-home','linkInter','menubar=yes,status=yes,resizable=yes,toolbar=yes,scrollbars=yes,location=no,directories=no');return(false);">&ldquo;Fourier Transform&rdquo; </a>in the <em>NX Nastran Advanced Dynamic Analysis User&rsquo;s Guide</em>. 
               </p>
            </li>
            <li>
               <p class="para_item">The continuation entry is optional. </p>
            </li>
         </ol>
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