<!DOCTYPE html
  PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<!--
Copyright (c) 2006 UGS Corp.

All Rights Reserved.

This software and related documentation are proprietary to UGS Corp.
-->
<html>
   <head>
      <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
      <title>SDAMPING</title>
      <script language="javaScript">
        abridged="false";
        displayConditions=new Array();
      </script>
      <link type="text/css" href="../css/main_styles.css" rel="stylesheet">
   </head>
   <body class="bodydocs" onload="top.pageLoader()" bgcolor="#FFFFFF">
      <hr noshade="true">
      <div class="title_refTopic" id="xps10_pagetitle">SDAMPING </div>
      <hr noshade="true">
      <h4 class="refClassification">Structural Damping Selection </h4>
      <p class="para_refTopic">Requests modal damping as a function of natural frequency in modal solutions or viscoelastic materials as a function of frequency in direct frequency response analysis. </p>
      <div class="title_refCategory">Format: </div>
      <div class="refCategoryContent">
         <p align="center"><img align="bottom" src="graphics/casecontrol4a-ufig55.gif"></p>
      </div>
      <div class="title_refCategory">Examples: </div>
      <div class="refCategoryContent"><pre class="indent">SDAMPING=77</pre></div>
      <div class="title_refCategory">Describers:</div>
      <div class="refCategoryContent">
         <table cellpadding="10" width="100%" align="center">
            <colgroup span="1">
               <col span="1" width="22*">
               <col span="1" width="78*">
            </colgroup>
            <thead>
               <tr>
                  <th align="left" colspan="1" rowspan="1">
                     <p class="para_th"><b class="uiTerm">Describer </b></p>
                  </th>
                  <th align="left" colspan="1" rowspan="1">
                     <p class="para_th"><b class="uiTerm">Meaning </b></p>
                  </th>
               </tr>
            </thead>
            <tbody>
               <tr>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">STRUCTURE or FLUID </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Modal damping is requested for the structural or fluid portion of the model. </p>
                  </td>
               </tr>
               <tr>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">n </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Set identification number of a TABDMP1 or TABLEDi Bulk Data entry. (Integer&gt;0) </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">In the modal solutions (e.g., SOLs 10, 11, 12, 110, 111, 112, 145, 146, and 200), SDAMPING must reference a TABDMP1 entry. </p>
            </li>
            <li>
               <p class="para_item">In direct frequency response (e.g., SOL 108), SDAMPING must reference a TABLEDi entry which defines viscoelastic (frequency-dependent) material properties.  See the <em>NX Nastran Advanced Dynamic Analysis User&rsquo;s Guide</em>. 
               </p>
            </li>
            <li>
               <p class="para_item">SDAMPING may be requested for superelements as long as PARAM,SESDAMP,YES is specified. </p>
            </li>
         </ol>
      </div>
   </body>
</html>