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      <title>PRESPT</title>
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      <div class="title_refTopic" id="xps10_pagetitle">PRESPT </div>
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      <h4 class="refClassification">Fluid Pressure Point </h4>
      <p class="para_refTopic">Defines the location of pressure points in the fluid for recovery of pressure data. </p>
      <div class="title_refCategory">Format: </div>
      <div class="refCategoryContent">
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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_th">3 </p>
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                     <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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                     <p class="para_th">7 </p>
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                     <p class="para_th">8 </p>
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                     <p class="para_th">9 </p>
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                     <p class="para_th">10 </p>
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                     <p class="para_td">PRESPT </p>
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                     <p class="para_td">IDF </p>
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                     <p class="para_td">&nbsp; </p>
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                     <p class="para_td">IDP1 </p>
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                     <p class="para_td">PHI1 </p>
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                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">IDP2 </p>
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                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">PHI2 </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">IDP3 </p>
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                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">PHI3 </p>
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                  <td align="center" bgcolor="gray" colspan="1" rowspan="1">
                     <p class="para_td">&nbsp; </p>
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      <div class="title_refCategory">Example: </div>
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                     <p class="para_td">PRESPT </p>
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                     <p class="para_td">14 </p>
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                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">&nbsp; </p>
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                     <p class="para_td">141 </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">0.0 </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">142 </p>
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                     <p class="para_td">90.0 </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">IDF </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Fluid point (RINGFL entry) identification number.  (Integer &gt; 0) </p>
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                     <p class="para_td">IDPi </p>
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                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Pressure point identification number.  (Integer &gt; 0) </p>
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                     <p class="para_td">PHIi </p>
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                     <p class="para_td">Azimuthal position on fluid point referenced by IDF in fluid coordinate system.  (Real) </p>
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      <div class="title_refCategory">Remarks: </div>
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            <li>
               <p class="para_item">PRESPT is allowed only if an AXIF entry is also present. </p>
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            <li>
               <p class="para_item">All pressure point identification numbers must be unique with respect to other scalar, structural, and fluid points. </p>
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            <li>
               <p class="para_item">The pressure points are used primarily for the identification of output data.  They may also be used as points at which to measure pressure for input to control devices (see <a class="links" href="javascript:void(0)" onclick="top.popUpPage('User/index.html?goto=User/24ref23140b_3.html&vars=-aux,-home','linkInter','menubar=yes,status=yes,resizable=yes,toolbar=yes,scrollbars=yes,location=no,directories=no');return(false);">&ldquo;Performing a Coupled Fluid-Structural Analysis&rdquo; </a>in the <em>NX Nastran User&rsquo;s Guide</em>). 
               </p>
            </li>
            <li>
               <p class="para_item">One, two, or three pressure points may be defined per entry. </p>
            </li>
            <li>
               <p class="para_item">Output requests for velocity and acceleration of these degrees-of-freedom will result in derivatives of pressure with respect to time. </p>
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