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      <title>FORCE</title>
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      <div class="title_refTopic" id="xps10_pagetitle">FORCE </div>
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      <h4 class="refClassification">Static Force </h4>
      <p class="para_refTopic">Defines a static concentrated force at a grid point by specifying a vector. </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">FORCE </p>
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                     <p class="para_td">SID </p>
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                     <p class="para_td">G </p>
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                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">CID </p>
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                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">F </p>
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                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">N1 </p>
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                     <p class="para_td">N2 </p>
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                     <p class="para_td">N3 </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">FORCE </p>
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                     <p class="para_td">2 </p>
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                     <p class="para_td">5 </p>
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                     <p class="para_td">6 </p>
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                     <p class="para_td">2.9 </p>
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                     <p class="para_td">0.0 </p>
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                     <p class="para_td">1.0 </p>
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                     <p class="para_td">0.0 </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">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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                     <p class="para_td">SID </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Load set identification number.  (Integer &gt; 0) </p>
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                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">G </p>
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                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Grid point identification number.  (Integer &gt; 0) </p>
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                     <p class="para_td">CID </p>
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                     <p class="para_td">Coordinate system identification number.  (Integer &ge; 0; Default = 0) </p>
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                     <p class="para_td">F </p>
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                     <p class="para_td">Scale factor.  (Real) </p>
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                     <p class="para_td">Ni </p>
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                     <p class="para_td">Components of a vector measured in coordinate system defined by CID.  (Real; at least one Ni &ne; 0.0.) </p>
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      <div class="title_refCategory">Remarks: </div>
      <div class="refCategoryContent">
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            <li>
               <p class="para_item">The static force applied to grid point G is given by </p>
               <p class="para_item"><img align="bottom" src="graphics/bulkfgil-equ05.gif" border="0"></p>
               <p class="para_item">where <img align="bottom" src="graphics/bulkfgil-ufig01.gif" border="0"> is the vector defined in fields 6, 7 and 8.  The magnitude of <img align="bottom" src="graphics/bulkfgil-ufig02.gif" border="0"> is equal to F times the magnitude of <img align="bottom" src="graphics/bulkfgil-ufig01.gif" border="0">. 
               </p>
            </li>
            <li>
               <p class="para_item">In the static solution sequences, the load set ID must be selected by the Case Control command LOAD = SID. In the dynamic solution sequences, SID must be referenced in the LID field of an LSEQ entry, which in turn must be selected by the Case Control command LOADSET. </p>
            </li>
            <li>
               <p class="para_item">A CID of zero or blank (the default) references the basic coordinate system. </p>
            </li>
            <li>
               <p class="para_item">For scalar points see SLOAD. </p>
            </li>
         </ol>
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      <div class="title_refCategory">Remarks related to SOLs 601 and 701: </div>
      <div class="refCategoryContent">
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            <li>
               <p class="para_item">To apply a force with constant magnitude, SID is selected by Case Control command LOAD = SID for both static and transient analyses. </p>
            </li>
            <li>
               <p class="para_item">To apply a time-dependent force, SID is referenced by the field EXCITEID = SID in the TLOAD1 entry. Time-dependent loads are selected by Case Control command DLOAD. </p>
            </li>
         </ol>
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