<!DOCTYPE html
  PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<!--
Copyright (c) 2006 UGS Corp.

All Rights Reserved.

This software and related documentation are proprietary to UGS Corp.
-->
<html>
   <head>
      <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
      <title>DSCREEN</title>
      <script language="javaScript">
        abridged="false";
        displayConditions=new Array();
      </script>
      <link type="text/css" href="../css/main_styles.css" rel="stylesheet">
   </head>
   <body class="bodydocs" onload="top.pageLoader()" bgcolor="#FFFFFF">
      <hr noshade="true">
      <div class="title_refTopic" id="xps10_pagetitle">DSCREEN </div>
      <hr noshade="true">
      <h4 class="refClassification">Design Constraint Screening Data </h4>
      <p class="para_refTopic">Defines screening data for constraint deletion. </p>
      <div class="title_refCategory">Format: </div>
      <div class="refCategoryContent">
         <table border="1" width="100%" align="center">
            <colgroup span="1">
               <col span="1" width="1135*">
               <col span="1" width="991*">
               <col span="1" width="979*">
               <col span="1" width="991*">
               <col span="1" width="979*">
               <col span="1" width="979*">
               <col span="1" width="991*">
               <col span="1" width="979*">
               <col span="1" width="991*">
               <col span="1" width="979*">
            </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="center" colspan="1" rowspan="1">
                     <p class="para_td">DSCREEN </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">TRS </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">NSTR </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">
         <table border="1" width="100%" align="center">
            <colgroup span="1">
               <col span="1" width="1288*">
               <col span="1" width="974*">
               <col span="1" width="962*">
               <col span="1" width="974*">
               <col span="1" width="962*">
               <col span="1" width="962*">
               <col span="1" width="974*">
               <col span="1" width="962*">
               <col span="1" width="974*">
               <col span="1" width="962*">
            </colgroup>
            <tbody>
               <tr>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">DSCREEN </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">-0.7 </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">&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="9" width="100%" align="center">
            <colgroup span="1">
               <col span="1" width="16*">
               <col span="1" width="84*">
            </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">RTYPE </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Response type for which the screening criteria apply.  See <a class="links" href="javascript:void(0)" onclick="top.openFile('QRG/15topic_26.html#ref84336');return(false);">Table 14-7</a> and Remark <a class="links" href="javascript:void(0)" onclick="top.openFile('QRG/15topic_26.html#ref41961');return(false);">32-3. </a> (Character) 
                     </p>
                  </td>
               </tr>
               <tr>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">TRS </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Truncation threshold.  (Real; Default = -0.5) </p>
                  </td>
               </tr>
               <tr>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">NSTR </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Maximum number of constraints to be retained per region per load case.  See Remark <a class="links" href="javascript:void(0)" onclick="top.openFile('QRG/15topic_26.html#ref41961');return(false);">32-3. </a> (Integer&gt;0; Default = 20) 
                     </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">Displacement and displacement derivative constraints associated with one particular load case are grouped by the specification of DRESP1 entries.  From each group, a maximum of NSTR constraints are retained per load case. </p><a name="ref84336"></a><div class="title_tableWrapper">Table 14-7. Default Region Specifications for RTYPE </div>
               <table border="1" cellpadding="8" width="746" align="center">
                  <colgroup span="1">
                     <col span="1" width="2090*">
                     <col span="1" width="2559*">
                     <col span="1" width="587*">
                     <col span="1" width="2105*">
                     <col span="1" width="2437*">
                  </colgroup>
                  <thead>
                     <tr>
                        <th align="center" bgcolor="#E0E0E0" colspan="1" rowspan="1">
                           <p class="para_th"><b class="uiTerm">RTYPE </b></p>
                        </th>
                        <th align="center" bgcolor="#E0E0E0" colspan="1" rowspan="1">
                           <p class="para_th"><b class="uiTerm">Default Region Specification </b></p>
                        </th>
                        <th align="center" colspan="1" rowspan="1">
                           <p class="para_th">&nbsp; </p>
                        </th>
                        <th align="center" bgcolor="#E0E0E0" colspan="1" rowspan="1">
                           <p class="para_th"><b class="uiTerm">RTYPE </b></p>
                        </th>
                        <th align="center" bgcolor="#E0E0E0" colspan="1" rowspan="1">
                           <p class="para_th"><b class="uiTerm">Default Region Specification </b></p>
                        </th>
                     </tr>
                  </thead>
                  <tbody>
                     <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">DRESP1 </p>
                        </td>
                        <td align="center" colspan="1" rowspan="12">
                           <p class="para_td">&nbsp; </p>
                           <p class="para_td">&nbsp; </p>
                           <p class="para_td">&nbsp; </p>
                           <p class="para_td">&nbsp; </p>
                           <p class="para_td">&nbsp; </p>
                           <p class="para_td">&nbsp; </p>
                           <p class="para_td">&nbsp; </p>
                           <p class="para_td">&nbsp; </p>
                           <p class="para_td">&nbsp; </p>
                           <p class="para_td">&nbsp; </p>
                        </td>
                        <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">DRESP1 </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">Property ID </p>
                        </td>
                        <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">DRESP1 </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">Property ID </p>
                        </td>
                        <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">Property ID </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">Property ID </p>
                        </td>
                        <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">Property ID </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">Property ID </p>
                        </td>
                        <td align="left" colspan="1" rowspan="1" valign="top">
                           <p class="para_td">FRSPC </p>
                        </td>
                        <td align="left" colspan="1" rowspan="1" valign="top">
                           <p class="para_td">DRESP1 </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">DRESP1 </p>
                        </td>
                        <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">DRESP1 </p>
                        </td>
                     </tr>
                     <tr>
                        <td align="left" colspan="1" rowspan="1" valign="top">
                           <p class="para_td">EQUA </p>
                        </td>
                        <td align="left" colspan="1" rowspan="1" valign="top">
                           <p class="para_td">DRESP2 </p>
                        </td>
                        <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">DRESP1 </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">Property ID </p>
                        </td>
                        <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">DRESP1 </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">Property ID </p>
                        </td>
                        <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">Property ID </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">Property ID </p>
                        </td>
                        <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">Property ID </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">DRESP1 </p>
                        </td>
                        <td align="left" colspan="1" rowspan="1" valign="top">
                           <p class="para_td">TSPC </p>
                        </td>
                        <td align="left" colspan="1" rowspan="1" valign="top">
                           <p class="para_td">DRESP1 </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">DRESP1 </p>
                        </td>
                        <td align="left" colspan="1" rowspan="1" valign="top">
                           <p class="para_td">&nbsp; </p>
                        </td>
                        <td align="left" colspan="1" rowspan="1" valign="top">
                           <p class="para_td">&nbsp; </p>
                        </td>
                     </tr>
                  </tbody>
               </table><br></li>
            <li>
               <p class="para_item">Stress-strain constraints are grouped by the property; i.e., all elements belonging to the set of PIDs specified under ATTi on a DRESPi entry are regarded as belonging to the same region.  In superelement sensitivity analysis, if the property (PID) is defined in more than one superelement, then separate regions are defined.  A particular stress constraint specification may be applied to many elements in a region generating many stress constraints, but only up to NSTR constraints per load case will be retained. </p>
            </li>
            <li><a name="ref41961"></a><p class="para_item">If RTYPE = &ldquo;WEIGHT&rdquo;, &ldquo;VOLUME&rdquo;, &ldquo;EIGN&rdquo;, &ldquo;FREQ&rdquo;, &ldquo;LAMA&rdquo;, &ldquo;TRIM&rdquo;, or &ldquo;STABDER&rdquo; then NSTR is unlimited and must be left blank. TRS is available for all response types. </p>
            </li>
            <li>
               <p class="para_item">If a certain type of constraint exists but no corresponding DSCREEN entry is specified, all the screening criteria used for this type of constraint will be furnished by the default values. </p>
            </li>
            <li>
               <p class="para_item">Constraints can be retained only if they are greater than TRS.  See the Remarks under the <a class="links" href="javascript:void(0)" onclick="top.openFile('QRG/15topic_4.html');return(false);">&ldquo;DCONSTR&rdquo;</a> entry for a definition of constraint value. 
               </p>
            </li>
            <li>
               <p class="para_item">Constraint screening is applied to each superelement. </p>
            </li>
         </ol>
      </div>
   </body>
</html>