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      <title>PELAS</title>
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      <div class="title_refTopic" id="xps10_pagetitle">PELAS </div>
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      <h4 class="refClassification">Scalar Elastic Property </h4>
      <p class="para_refTopic">Specifies the stiffness, damping coefficient, and stress coefficient of a scalar elastic (spring) element (CELAS1 or CELAS3 entry). </p>
      <div class="title_refCategory">Format: </div>
      <div class="refCategoryContent">
         <table border="1" width="100%" align="center">
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                     <p class="para_th">1 </p>
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                     <p class="para_th">2 </p>
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                     <p class="para_th">3 </p>
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                     <p class="para_th">4 </p>
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                     <p class="para_th">5 </p>
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                     <p class="para_th">6 </p>
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                     <p class="para_th">7 </p>
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                     <p class="para_th">8 </p>
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                     <p class="para_th">9 </p>
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                     <p class="para_th">10 </p>
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            <tbody>
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                     <p class="para_td">PELAS </p>
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                     <p class="para_td">PID1 </p>
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                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">K1 </p>
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                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">GE1 </p>
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                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">S1 </p>
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                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">PID2 </p>
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                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">K2 </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">GE2 </p>
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                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">S2 </p>
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                  <td align="center" bgcolor="gray" colspan="1" rowspan="1">
                     <p class="para_td">&nbsp; </p>
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      <div class="title_refCategory">Example: </div>
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                     <p class="para_td">PELAS </p>
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                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">7 </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">4.29 </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">0.06 </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">7.92 </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">27 </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">2.17 </p>
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                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">0.0032 </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>
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            </tbody>
         </table><br></div>
      <div class="title_refCategory">Fields:</div>
      <div class="refCategoryContent">
         <table cellpadding="9" width="100%" align="center">
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               <col span="1" width="15.97*">
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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>
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            </thead>
            <tbody>
               <tr>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">PIDi </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Property identification number.  (Integer &gt; 0) </p>
                  </td>
               </tr>
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                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Ki </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Elastic property value.  (Real) </p>
                  </td>
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                     <p class="para_td">GEi </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Damping coefficient, <em>g<sub class="subscript">e</sub></em>.  See Remarks <a class="links" href="javascript:void(0)" onclick="top.openFile('QRG/18topic_34.html#refsMjHi68lori');return(false);">53-5</a> and <a class="links" href="javascript:void(0)" onclick="top.openFile('QRG/18topic_34.html#ref9UGjq1a4lori');return(false);">53-6. </a> (Real) 
                     </p>
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                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Si </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Stress coefficient.  (Real) </p>
                  </td>
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         </table><br></div>
      <div class="title_refCategory">Remarks: </div>
      <div class="refCategoryContent">
         <ol type="1" start="1">
            <li>
               <p class="para_item">Be careful using negative spring values. </p>
            </li>
            <li>
               <p class="para_item">Spring values are defined directly on the CELAS2 and CELAS4 entries, and therefore do not require a PELAS entry. </p>
            </li>
            <li>
               <p class="para_item">One or two elastic spring properties may be defined on a single entry. </p>
            </li>
            <li>
               <p class="para_item">For a discussion of scalar elements, see <a class="links" href="javascript:void(0)" onclick="top.popUpPage('QRG/linkInter_target_not_resolved.html#element:ref18917:-aux,-home','linkInter','menubar=yes,status=yes,resizable=yes,toolbar=yes,scrollbars=yes,location=no,directories=no');return(false);"><em>&ldquo;Overview of 0D (Scalar) Elements&rdquo;</em></a> in the <em>NX Nastran Element Library</em>. 
               </p>
            </li>
            <li><a name="refsMjHi68lori"></a><p class="para_item">If PARAM,W4 is not specified, GEi is ignored in transient analysis.  See <a class="links" href="javascript:void(0)" onclick="top.openFile('QRG/08ref24356_1.html');return(false);">&ldquo;Parameters&rdquo; </a>. 
               </p>
            </li>
            <li><a name="ref9UGjq1a4lori"></a><p class="para_item">To obtain the damping coefficient GE, multiply the critical damping ratio C/C<sub class="subscript">o</sub> by 2.0. 
               </p>
            </li>
            <li>
               <p class="para_item">If PELAS is used in conjunction with PELAST, Ki &gt; 0. </p>
            </li>
         </ol>
      </div>
      <div class="title_refCategory">Remarks related to SOLs 601 and 701: </div>
      <div class="refCategoryContent">
         <p class="para_refCategory">GEi is ignored. </p>
      </div>
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