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      <title>TF</title>
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      <div class="title_refTopic" id="xps10_pagetitle">TF </div>
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      <h4 class="refClassification">Dynamic Transfer Function </h4>
      <p class="para_refTopic">Defines a dynamic transfer function of the form: </p>
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      <div class="refCategoryContent"><a name="ref36368"></a><div class="figure">
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                        <p align="left"><img align="bottom" src="graphics/bulktuv-equ40.gif"></p>
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                        <p class="para_td">= 0</p>
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         <div class="title_figure">Equation 19-1. </div>
         <p class="para_refCategory">Can also be used as a means of direct matrix input.  See Remark <a class="links" href="javascript:void(0)" onclick="top.openFile('QRG/20topic_24.html#refopxUj3a2lori');return(false);">29-4. </a></p>
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      <div class="title_refCategory">Format: </div>
      <div class="refCategoryContent">
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                     <p class="para_th">1 </p>
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                  <th align="center" colspan="1" rowspan="1">
                     <p class="para_th">2 </p>
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                  <th align="center" colspan="1" rowspan="1">
                     <p class="para_th">3 </p>
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                  <th align="center" colspan="1" rowspan="1">
                     <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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                  <th align="center" colspan="1" rowspan="1">
                     <p class="para_th">7 </p>
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                  <th align="center" colspan="1" rowspan="1">
                     <p class="para_th">8 </p>
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                  <th align="center" colspan="1" rowspan="1">
                     <p class="para_th">9 </p>
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                  <th align="center" colspan="1" rowspan="1">
                     <p class="para_th">10 </p>
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            <tbody>
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                     <p class="para_td">TF </p>
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                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">SID </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">GD </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">CD </p>
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                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">B0 </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">B1 </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">B2 </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" colspan="1" rowspan="1">
                     <p class="para_td">&nbsp; </p>
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                     <p class="para_td">&nbsp; </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">G(1) </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">C(1) </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">A0(1) </p>
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                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">A1(1) </p>
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                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">A2(1) </p>
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                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">-etc.- </p>
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                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">&nbsp; </p>
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                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">&nbsp; </p>
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                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">&nbsp; </p>
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      <div class="title_refCategory">Example: </div>
      <div class="refCategoryContent">
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                     <p class="para_td">TF </p>
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                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">1 </p>
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                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">2 </p>
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                     <p class="para_td">3 </p>
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                     <p class="para_td">4.0 </p>
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                     <p class="para_td">5.0 </p>
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                     <p class="para_td">6.0 </p>
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                     <p class="para_td">&nbsp; </p>
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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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                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">&nbsp; </p>
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                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">3 </p>
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                     <p class="para_td">4 </p>
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                     <p class="para_td">5.0 </p>
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                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">6.0 </p>
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                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">7.0 </p>
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                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">&nbsp; </p>
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                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">&nbsp; </p>
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                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">&nbsp; </p>
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                  <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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            <tbody>
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                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">SID </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Set identification number.  (Integer &gt; 0) </p>
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                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">GD, G(i) </p>
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                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Grid, scalar, or extra point identification numbers.  (Integer &gt; 0) </p>
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                     <p class="para_td">CD, C(i) </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Component numbers.  (Integer zero or blank for scalar or extra points, any one of the Integers 1 through 6 for a grid point.) </p>
                  </td>
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                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">B0, B1, B2A0(i), A1(i), A2(i) </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Transfer function coefficients.  (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">Transfer function sets must be selected with the Case Control command TFL=SID. </p>
            </li>
            <li>
               <p class="para_item">Continuation entries are optional. </p>
            </li>
            <li>
               <p class="para_item">The matrix elements defined by this entry are added to the dynamic matrices for the problem. </p>
            </li>
            <li><a name="refopxUj3a2lori"></a><p class="para_item">The constraint relation given in <a class="links" href="javascript:void(0)" onclick="top.openFile('QRG/20topic_24.html#ref36368');return(false);">Equation 19-1</a> will hold only if no structural elements or other matrix elements are connected to the dependent coordinate <em>u<sub class="subscript">d</sub></em>.  In fact, the terms on the left side of <a class="links" href="javascript:void(0)" onclick="top.openFile('QRG/20topic_24.html#ref36368');return(false);">Equation 19-1</a> are simply added to the terms from all other sources in the row for <em>u<sub class="subscript">d</sub></em>. 
               </p>
            </li>
            <li>
               <p class="para_item">See the <em><a class="links" href="javascript:void(0)" onclick="top.popUpPage('QRG/linkInter_target_not_resolved.html#adv_dyn:ref86112:-aux,-home','linkInter','menubar=yes,status=yes,resizable=yes,toolbar=yes,scrollbars=yes,location=no,directories=no');return(false);">NX Nastran Advanced Dynamic Analysis User&rsquo;s Guide</a></em> for a discussion of transfer functions. 
               </p>
            </li>
            <li>
               <p class="para_item">For each SID, only one logical entry is allowed for each GD, CD combination. </p>
            </li>
            <li>
               <p class="para_item">For heat transfer analysis, the initial conditions must satisfy <a class="links" href="javascript:void(0)" onclick="top.openFile('QRG/20topic_24.html#ref36368');return(false);">Equation 19-1</a>. 
               </p>
            </li>
         </ol>
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