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      <title>RINGAX</title>
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      <div class="title_refTopic" id="xps10_pagetitle">RINGAX </div>
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      <h4 class="refClassification">Conical Shell Ring </h4>
      <p class="para_refTopic">Defines a ring for conical shell problems. </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_th">6 </p>
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                     <p class="para_th">10 </p>
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                     <p class="para_td">RINGAX </p>
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                     <p class="para_td">ID </p>
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                     <p class="para_td">&nbsp; </p>
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                     <p class="para_td">R </p>
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                     <p class="para_td">Z </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">PS </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">Example: </div>
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                     <p class="para_td">RINGAX </p>
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                     <p class="para_td">3 </p>
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                     <p class="para_td">&nbsp; </p>
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                     <p class="para_td">2.0 </p>
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                     <p class="para_td">-10.0 </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">162 </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">ID </p>
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                     <p class="para_td">Ring identification number.  See Remark <a class="links" href="javascript:void(0)" onclick="top.openFile('QRG/19topic_27.html#ref39634a');return(false);">40-6. </a> (Integer &gt; 0) 
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                     <p class="para_td">R </p>
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                     <p class="para_td">Ring radius.  (Real &gt; 0.0) </p>
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                     <p class="para_td">Z </p>
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                     <p class="para_td">Ring axial location.  (Real) </p>
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                     <p class="para_td">PS </p>
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                     <p class="para_td">Permanent single-point constraints.  (Any unique combination of the Integers 1 through 6 with no embedded blanks.) </p>
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      <div class="title_refCategory">Remarks: </div>
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            <li>
               <p class="para_item">RINGAX is allowed only if an AXIC entry is also present. </p>
            </li>
            <li>
               <p class="para_item">The number of degrees-of-freedom defined is (6 − NPS) ·<em>H</em> where <em>H</em> is the harmonic count and NPS is the number of digits in field 8.  (See <a class="links" href="javascript:void(0)" onclick="top.openFile('QRG/12topic_22.html');return(false);">&ldquo;AXIC&rdquo; </a>). 
               </p>
            </li>
            <li>
               <p class="para_item">RINGAX identification numbers must be unique with respect to all other POINTAX, RINGAX, and SECTAX identification numbers. </p>
            </li>
            <li>
               <p class="para_item">For a discussion of the conical shell problem, see <a class="links" href="javascript:void(0)" onclick="top.popUpPage('QRG/linkInter_target_not_resolved.html#element:ref32336:-aux,-home','linkInter','menubar=yes,status=yes,resizable=yes,toolbar=yes,scrollbars=yes,location=no,directories=no');return(false);">&ldquo;Conical Shell Element (RINGAX)&rdquo; </a>in the <em>NX Nastran Element Library</em>. 
               </p>
            </li>
            <li>
               <p class="para_item">Constraints may be necessary to avoid matrix singularities.  The CONEAX element has no stiffness for rotation about the normal.  In addition, there is no stiffness for rotation about V (see <a class="links" href="javascript:void(0)" onclick="top.openFile('QRG/19topic_27.html#ref53708');return(false);">Figure 18-</a>) when transverse shear flexibility is not included. 
               </p><a name="ref53708"></a><div class="figure">
                  <p align="center"><img align="bottom" src="graphics/bulkqrs-fig02.gif"></p>
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               <div class="title_figure">Figure. RINGAX Coordinate System </div>
            </li>
            <li><a name="ref39634a"></a><p class="para_item">In order to reference this entry on a SET Case Control command, the ID must be modified by ID (n)=ID + 1000000 · n where n is the harmonic number plus one and ID(n) is the value specified on the SET entry. </p>
            </li>
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