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      <title>GUST</title>
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      <div class="title_refTopic" id="xps10_pagetitle">GUST </div>
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      <h4 class="refClassification">Aerodynamic Gust Load Description </h4>
      <p class="para_refTopic">Defines a stationary vertical gust for use in aeroelastic response analysis. </p>
      <div class="title_refCategory">Format: </div>
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                     <p class="para_th">1 </p>
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                     <p class="para_th">2 </p>
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                     <p class="para_td">GUST </p>
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                     <p class="para_td">SID </p>
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                     <p class="para_td">DLOAD </p>
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                     <p class="para_td">WG </p>
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                     <p class="para_td">X0 </p>
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                     <p class="para_td">V </p>
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                     <p class="para_td">&nbsp; </p>
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                     <p class="para_td">&nbsp; </p>
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                     <p class="para_td">&nbsp; </p>
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                     <p class="para_td">GUST </p>
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                     <p class="para_td">133 </p>
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                     <p class="para_td">61 </p>
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                     <p class="para_td">1.0 </p>
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                     <p class="para_td">0. </p>
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                     <p class="para_td">1.+4 </p>
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                     <p class="para_td">&nbsp; </p>
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                     <p class="para_td">&nbsp; </p>
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                     <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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                     <p class="para_td">SID </p>
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                     <p class="para_td">Gust set identification number.  (Integer &gt; 0) </p>
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                     <p class="para_td">DLOAD </p>
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                     <p class="para_td">Set identification number of a TLOADi or RLOADi entry that defines the time or frequency dependence.  (Integer &gt; 0) </p>
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                     <p class="para_td">WG </p>
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                     <p class="para_td">Scale factor (gust velocity/forward velocity) for gust velocity.  (Real &ne; 0.0) </p>
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                     <p class="para_td">X0 </p>
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                     <p class="para_td">Streamwise location in the aerodynamic coordinate system of the gust reference point.  (Real) </p>
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                     <p class="para_td">V </p>
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                     <p class="para_td">Velocity of vehicle.  See Remark <a class="links" href="javascript:void(0)" onclick="top.openFile('QRG/16topic_36.html#ref25541');return(false);">54-5. </a> (Real &gt; 0.0) 
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      <div class="title_refCategory">Remarks: </div>
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            <li>
               <p class="para_item">The GUST entry must be selected with the Case Control command GUST = SID. </p>
            </li>
            <li>
               <p class="para_item">The gust angle is in the +z direction of the aerodynamic coordinate system.  The value is </p>
               <p class="para_item"><img align="bottom" src="graphics/bulkfgil-equ61.gif" border="0"></p>
               <p class="para_item">where <em>T</em> is the tabular function. 
               </p>
            </li>
            <li>
               <p class="para_item">In random analysis, a unit gust velocity (WG = 1/velocity) is suggested.  The actual rms value is entered on the TABRNDG entry. </p>
            </li>
            <li>
               <p class="para_item">X0 and V may not change between subcases under one execution. </p>
            </li>
            <li><a name="ref25541"></a><p class="para_item">V must be equal to VELOCITY on the AERO Bulk Data entry. </p>
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