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      <title>TABLED2</title>
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      <div class="title_refTopic" id="xps10_pagetitle">TABLED2 </div>
      <hr noshade="true">
      <h4 class="refClassification">Dynamic Load Tabular Function, Form 2 </h4>
      <p class="para_refTopic">Defines a tabular function for use in generating frequency-dependent and time-dependent dynamic loads.  Also contains parametric data for use with the table. </p>
      <div class="title_refCategory">Format: </div>
      <div class="refCategoryContent">
         <table border="1" width="100%" align="center">
            <colgroup span="1">
               <col span="1" width="11.42*">
               <col span="1" width="9.48*">
               <col span="1" width="10.25*">
               <col span="1" width="10.25*">
               <col span="1" width="10.25*">
               <col span="1" width="10.25*">
               <col span="1" width="10.25*">
               <col span="1" width="10.25*">
               <col span="1" width="8.89*">
               <col span="1" width="8.70*">
            </colgroup>
            <thead>
               <tr>
                  <th align="center" colspan="1" rowspan="1">
                     <p class="para_th">1 </p>
                  </th>
                  <th align="center" colspan="1" rowspan="1">
                     <p class="para_th">2 </p>
                  </th>
                  <th align="center" colspan="1" rowspan="1">
                     <p class="para_th">3 </p>
                  </th>
                  <th align="center" colspan="1" rowspan="1">
                     <p class="para_th">4 </p>
                  </th>
                  <th align="center" colspan="1" rowspan="1">
                     <p class="para_th">5 </p>
                  </th>
                  <th align="center" colspan="1" rowspan="1">
                     <p class="para_th">6 </p>
                  </th>
                  <th align="center" colspan="1" rowspan="1">
                     <p class="para_th">7 </p>
                  </th>
                  <th align="center" colspan="1" rowspan="1">
                     <p class="para_th">8 </p>
                  </th>
                  <th align="center" colspan="1" rowspan="1">
                     <p class="para_th">9 </p>
                  </th>
                  <th align="center" colspan="1" rowspan="1">
                     <p class="para_th">10 </p>
                  </th>
               </tr>
            </thead>
            <tbody>
               <tr>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">TABLED2 </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">TID </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">X1 </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" 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" 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>
                  </td>
               </tr>
               <tr>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">&nbsp; </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">x1 </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">y1 </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">x2 </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">y2 </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">x3 </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">y3 </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">-etc.- </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>
               </tr>
            </tbody>
         </table><br></div>
      <div class="title_refCategory">Example: </div>
      <div class="refCategoryContent">
         <table border="1" width="100%" align="center">
            <colgroup span="1">
               <col span="1" width="11.72*">
               <col span="1" width="10.17*">
               <col span="1" width="10.17*">
               <col span="1" width="10.17*">
               <col span="1" width="10.17*">
               <col span="1" width="10.17*">
               <col span="1" width="10.17*">
               <col span="1" width="10.17*">
               <col span="1" width="8.63*">
               <col span="1" width="8.43*">
            </colgroup>
            <tbody>
               <tr>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">TABLED2 </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">15 </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">-10.5 </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>
                  <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>
                  <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>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">&nbsp; </p>
                  </td>
               </tr>
               <tr>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">&nbsp; </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">1.0 </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">-4.5 </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">2.0 </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">-4.2 </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">2.0 </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">2.8 </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">7.0 </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">6.5 </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">&nbsp; </p>
                  </td>
               </tr>
               <tr>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">&nbsp; </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">SKIP </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">SKIP </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">9.0 </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">6.5 </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">ENDT </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>
                  <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>
               </tr>
            </tbody>
         </table><br></div>
      <div class="title_refCategory">Fields:</div>
      <div class="refCategoryContent">
         <table cellpadding="9" width="100%" align="center">
            <colgroup span="1">
               <col span="1" width="18.93*">
               <col span="1" width="81.07*">
            </colgroup>
            <thead>
               <tr>
                  <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>
                  </th>
               </tr>
            </thead>
            <tbody>
               <tr>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">TID </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Table identification number.  (Integer &gt; 0) </p>
                  </td>
               </tr>
               <tr>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">X1 </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Table parameter.  See Remark <a class="links" href="javascript:void(0)" onclick="top.openFile('QRG/20topic_5.html#ref27869');return(false);">5-6. </a> (Real) 
                     </p>
                  </td>
               </tr>
               <tr>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">xi, yi </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Tabular values.  (Real) </p>
                  </td>
               </tr>
            </tbody>
         </table><br></div>
      <div class="title_refCategory">Remarks: </div>
      <div class="refCategoryContent">
         <ol type="1" start="1">
            <li>
               <p class="para_item">xi must be in either ascending or descending order, but not both. </p>
            </li>
            <li>
               <p class="para_item">Discontinuities may be specified between any two points except the two starting points or two end points.  For example, in <a class="links" href="javascript:void(0)" onclick="top.openFile('QRG/20topic_5.html#ref13719');return(false);">Figure 19-</a> discontinuities are allowed only between points x2 and x7.  Also if y is evaluated at a discontinuity, then the average value of y is used.  In <a class="links" href="javascript:void(0)" onclick="top.openFile('QRG/20topic_5.html#ref13719');return(false);">Figure 19-</a>, the value of y at x=x3 is <em>y</em>=(<em>y</em>3+<em>y</em>4) / 2. 
               </p>
            </li>
            <li>
               <p class="para_item">At least one continuation entry must be specified. </p>
            </li>
            <li>
               <p class="para_item">Any xi-yi pair may be ignored by placing &ldquo;SKIP&rdquo; in either of the two fields. </p>
            </li>
            <li>
               <p class="para_item">The end of the table is indicated by the existence of &ldquo;ENDT&rdquo; in either of the two fields following the last entry.  An error is detected if any continuations follow the entry containing the end-of-table flag &ldquo;ENDT&rdquo;. </p>
            </li>
            <li><a name="ref27869"></a><p class="para_item">TABLED2 uses the algorithm </p>
               <p align="center"><img align="bottom" src="graphics/bulktuv-equ13.gif"></p>
               <p class="para_item">where <em>x</em> is input to the table and <em>y</em> is returned.  The table look-up is performed using linear interpolation within the table and linear extrapolation outside the table using the two starting or end points.  See <a class="links" href="javascript:void(0)" onclick="top.openFile('QRG/20topic_5.html#ref13719');return(false);">Figure 19-</a>.  No warning messages are issued if table data is input incorrectly. 
               </p><a name="ref13719"></a><div class="figure">
                  <p align="center"><img align="bottom" src="graphics/bulktuv-fig03.gif"></p>
               </div>
               <div class="title_figure">Figure. Example of Table Extrapolation and Discontinuity </div>
            </li>
            <li>
               <p class="para_item">Linear extrapolation is not used for Fourier transform methods.  The function is zero outside the range of the table. </p>
            </li>
            <li>
               <p class="para_item">For frequency-dependent loads, X1 and xi are measured in cycles per unit time. </p>
            </li>
         </ol>
      </div>
      <div class="title_refCategory">Remarks related to SOLs 601 and 701: </div>
      <div class="refCategoryContent">
         <ol type="1" start="1">
            <li>
               <p class="para_item">TABLED2 is referenced by the TID field in TLOAD1 entry to model time-dependent loading. xi is therefore the time value and yi is the multiplier factor for the load. </p>
            </li>
            <li>
               <p class="para_item">X1 is the delay time (or arrival time of the load), i.e., at time &lt; X1, the load is not active. </p>
            </li>
            <li>
               <p class="para_item">Discontinuities are not allowed. </p>
            </li>
            <li>
               <p class="para_item">No table extrapolation is done beyond the range of specified xi values. Hence, the range of xi values should at least span the solution start and end times. In most cases, x1=0.0 should be specified since the solution start time is usually 0.0. The solution end time depends on the time steps defined in the TSTEP entry. </p>
            </li>
         </ol>
      </div>
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