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      <title>STATSUB</title>
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      <div class="title_refTopic" id="xps10_pagetitle">STATSUB </div>
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      <h4 class="refClassification">Static Solution Selection for Differential Stiffness </h4>
      <p class="para_refTopic">Selects the static solution to use in forming the differential stiffness for buckling analysis, normal modes, complex eigenvalue, frequency response and transient response analysis. </p>
      <div class="title_refCategory">Format: </div>
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         <p align="center"><img align="bottom" src="graphics/casecontrol4a-ufig73.gif"></p>
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      <div class="title_refCategory">Examples: </div>
      <div class="refCategoryContent"><pre class="indent">STATSUB=23
STAT=4
STATSUB(PREL)=7</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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                  <th align="left" colspan="1" rowspan="1">
                     <p class="para_th"><b class="uiTerm">Meaning </b></p>
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                     <p class="para_td">BUCKLING </p>
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                     <p class="para_td">Subcase id number corresponding to static subcase of buckling or varying load. (Default in buckling analysis.) </p>
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                     <p class="para_td">PRELOAD </p>
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                     <p class="para_td">Subcase id number corresponding to static subcase of preload or constant load. (Default in dynamic analysis.) </p>
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                     <p class="para_td">n </p>
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                     <p class="para_td">Subcase identification number of a prior SUBCASE specified for static analysis (Integer&gt;0) </p>
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      <div class="title_refCategory">Remarks: </div>
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               <p class="para_item">STATSUB may be used in SOLs 103, 105, 107 through 112, and SOL 200 (ANALYSIS = BUCKLING) only. </p>
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            <li>
               <p class="para_item">STATSUB must be specified in the same subcase that contains the METHOD selection for buckling or normal modes, CMETHOD for complex eigenvalue analysis, TSTEP for transient response and FREQ for frequency response. </p>
            </li>
            <li>
               <p class="para_item">In SOL 105, if it is intended that results from the first static subcase are used to compute the differential stiffness, then the STATSUB command is not required.  In other words, the default for STATSUB is the first static subcase identification.  In SOLs 103 and 107 through 112, 115, and 116, STATSUB must reference a separate static subcase. </p>
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            <li>
               <p class="para_item">In dynamic analysis, only one STATSUB command may be specified in each dynamic subcase. In buckling analysis with a pre-load, both STATSUB (BUCKLING) and STATSUB(PRELOAD) must be specified in each buckling subcase. </p>
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            <li>
               <p class="para_item">If superelements are used , the static subcase which is identified in the STATSUB command must include the residual superelement or the solution will fail with an error. </p>
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            <li>
               <p class="para_item">If multiple superelements are used with the STATSUB command, each must be used in a static subcase or their differential stiffness will not be included. All superelements can be used in a single static subcase using SUPER=ALL, or a separate subcase can exist for each one (order of subcases is not important). In either case, the STATSUB command should point to the subcase which references the residual (see above remark). </p>
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