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      <title>MODCON</title>
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      <div class="title_refTopic" id="xps10_pagetitle">MODCON </div>
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      <h4 class="refClassification">Modal Contribution Request</h4>
      <p class="para_refTopic">Requests the output of modal contribution data for SOL 111.</p>
      <div class="title_refCategory">Format: </div>
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         <p class="para_refCategory">MODCON=YES/NO</p>
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      <div class="title_refCategory">Examples: </div>
      <div class="refCategoryContent"><pre class="indent">MODCON=YES</pre></div>
      <div class="title_refCategory">Describers:</div>
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                     <p class="para_th"><b class="uiTerm">Describer </b></p>
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                     <p class="para_th"><b class="uiTerm">Meaning </b></p>
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                     <p class="para_td">NO</p>
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                     <p class="para_td">Do not output modal contribution data. (Default)</p>
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                     <p class="para_td">YES</p>
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                     <p class="para_td">Modal contribution data will be output.</p>
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      <div class="title_refCategory">Remarks: </div>
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            <li>
               <p class="para_item">The option to PRINT, PLOT, or PUNCH the modal contribution data can be selected by the DISP, VELO, ACCE and the SDISP, SVELO and SACCELERATION case control methods.</p>
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            <li>
               <p class="para_item">Output of modal contribution can only occur on grids. Element output is not supported at this time.</p>
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            <li>
               <p class="para_item">No new bulk data entries are required, however, the USET card with U3 can be used to define the <em>l=1,....n</em> degrees of freedom which modal contributions are computed.
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            <li>
               <p class="para_item">The complex and actual modal contributions are assigned with dummy subcase IDs for each dof in the f06 and punch files to distinguish each set of results while post processing. It is recommended to use a large increment when assigning the SUBCASE IDs in the case control section to avoid a dummy ID duplicating a case control ID.</p>
            </li>
            <li>
               <p class="para_item">This capability is NOT supported for the constraint mode method of enforced motion.</p>
            </li>
            <li>
               <p class="para_item">This capability is not supported for models having rigid body or fluid modes.</p>
            </li>
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