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      <title>RROD</title>
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      <div class="title_refTopic" id="xps10_pagetitle">RROD </div>
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      <h4 class="refClassification">Rigid Pin-Ended Element Connection </h4>
      <p class="para_refTopic">Defines a pin-ended element that is rigid in translation. </p>
      <div class="title_refCategory">Format: </div>
      <div class="refCategoryContent">
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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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                     <p class="para_td">RROD </p>
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                     <p class="para_td">EID </p>
                  </td>
                  <td align="center" colspan="1" height="20" rowspan="1">
                     <p class="para_td">GA </p>
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                     <p class="para_td">GB </p>
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                  <td align="center" colspan="1" height="20" rowspan="1">
                     <p class="para_td">CMA </p>
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                     <p class="para_td">CMB </p>
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                     <p class="para_td">&nbsp;ALPHA</p>
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                     <p class="para_td">&nbsp; </p>
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                     <p class="para_td">&nbsp; </p>
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                     <p class="para_td">&nbsp; </p>
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      <div class="title_refCategory">Example: </div>
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                     <p class="para_td">RROD </p>
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                     <p class="para_td">14 </p>
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                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">1 </p>
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                     <p class="para_td">2 </p>
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                     <p class="para_td">2 </p>
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                     <p class="para_td">&nbsp; </p>
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                     <p class="para_td">&nbsp; </p>
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                     <p class="para_td">&nbsp; </p>
                  </td>
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                     <p class="para_td">&nbsp; </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">&nbsp; </p>
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      <div class="title_refCategory">Fields:</div>
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                     <p class="para_th"><b class="uiTerm">Field </b></p>
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                     <p class="para_th"><b class="uiTerm">Contents </b></p>
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                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">EID </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Element identification number.  (Integer &gt; 0) </p>
                  </td>
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                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">GA, GB </p>
                  </td>
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                     <p class="para_td">Grid point identification numbers of connection points.  (Integer &gt; 0) </p>
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                     <p class="para_td">CMA, CMB </p>
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                     <p class="para_td">Component number of one and only one dependent translational degree-of-freedom in the global coordinate system assigned by the user to either GA or GB.  (Integer 1, 2, or 3.  Either CMA or CMB must contain the integer, and the other must be blank.) </p>
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                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">ALPHA</p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Thermal expansion coefficient. (Real &gt; 0.0)</p>
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      <div class="title_refCategory">Remarks: </div>
      <div class="refCategoryContent">
         <ol type="1" start="1">
            <li>
               <p class="para_item">The m-set coordinates specified on this entry may not be specified on other entries that define mutually exclusive sets.  See <a class="links" href="javascript:void(0)" onclick="top.openFile('QRG/10ref73695_1.html');return(false);">&ldquo;Degree-of-Freedom Sets&rdquo; </a> for a list of these entries. 
               </p>
            </li>
            <li>
               <p class="para_item">Element identification numbers should be unique with respect to all other element identification numbers. </p>
            </li>
            <li>
               <p class="para_item">Rigid elements, unlike MPCs, are not selected through the Case Control Section. </p>
            </li>
            <li>
               <p class="para_item">Forces of multipoint constraint may be recovered in all solution sequences, except SOL 129, with the MPCFORCE Case Control command. </p>
            </li>
            <li>
               <p class="para_item">Rigid elements are ignored in heat transfer problems. </p>
            </li>
            <li>
               <p class="para_item">The degree-of-freedom selected to be dependent must have a nonzero component along the axis of the element.  This implies that the element must have finite length. </p>
            </li>
            <li>
               <p class="para_item">See R-Type Elements in the<em>NX Nastran Element Library</em> for a discussion of rigid elements. 
               </p>
            </li>
         </ol>
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