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<a name = "hj-top"> </a><table class = "table1" id = "table11"><tr><td><table class = "DocHeader"><tr><td class = "DocHeader1" colspan = "2"><h1>Manufacturing Conditions and Geometrical Restrictions </h1></td></tr><tr><td class = "DocHeader4" colspan = "2"/></tr><tr><td class = "DocHeader3" colspan = "2"><table class = "DocThemeIntro" id = "table12"><tr><td class = "Intro1"><p class = "header"><p class = "abstract"> 
   <span class = "shortdesc">For sizing with 
    <span class = "ph">SIMULIA Tosca Structure</span>,
    it is possible to define constraints (<code class = "ph codeph">DVCON_SIZING</code>
)
    that have a direct influence on the individual design variables
    (<code class = "ph codeph">DV_SIZING</code>).
    This allows the manufacturing restrictions or geometrical design aspects to be
    taken into consideration in the sizing optimization. 
   </span>
 
   <p> The different restrictions are listed below: 
   </p> 
   <ul class = "ul" id = "tso-m-usr-sizing-manuCond-sb__ul_944698301D1347BFB9739E0B346594B2"> 
    <li class = "li">Frozen area 
      <ul class = "ul" id = "tso-m-usr-sizing-manuCond-sb__ul_C296C683197E4B3BB3524ACB49234BE0"> 
       <li class = "li">Element fixing by
        exclusion from the optimization group. 
       </li> 
       <li class = "li">Element fixing by
        freezing elements (<code class = "ph codeph">CHECK_TYPE = FROZEN</code>). 
       </li> 
      </ul> 
    </li> 
    <li class = "li">Shell thickness control 
      <ul class = "ul" id = "tso-m-usr-sizing-manuCond-sb__ul_9C14277DE4804FD8AD44042D66740FF8"> 
       <li class = "li">Upper and lower bounds
        for shell thicknesses (<code class = "ph codeph">CHECK_TYPE = THICKNESS_BOUNDS</code>). 
       </li> 
       <li class = "li">Clustering of element
        areas with the same shell thickness (<code class = "ph codeph">CHECK_TYPE = CLUSTER</code>) 
       </li> 
      </ul> 
    </li> 
     
    <li class = "li">Symmetry control 
      <ul class = "ul" id = "tso-m-usr-sizing-manuCond-sb__ul_6DE51DF3659040E49F5E6B430EF90E96"> 
       <li class = "li">Area linking ( 
        <code class = "ph codeph">LINK_SIZING</code>

        )</li> 
       <li class = "li">Symmetry restriction ( 
        <code class = "ph codeph">LINK_SIZING</code>)

       </li> 
      </ul> 
    </li> 
    <li class = "li">Member size control 
      <ul class = "ul" id = "tso-m-usr-sizing-manuCond-sb__ul_6D49DB509CB0409EB003B7B3EA5ECA8B"> 
       <li class = "li">Minimum cluster width
        control (<code class = "ph codeph">CHECK_TYPE = MIN_CLUSTER_WIDTH</code>) 
       </li> 
       <li class = "li">Maximum member size
        control (<code class = "ph codeph">CHECK_TYPE = MAX_MEMBER</code>) 
       </li> 
      </ul> 
    </li> 
   </ul></p>

</p><hr class = "header"/></td></tr><tr><td class = "Intro2"><span class = "run-in">In this section:</span><br/><ul class = "ulthemes"><li><a title = "Sometimes it is required to maintain material in certain parts of the design area, such that they remain unchanged in the optimized model. Element groups describing these parts can be defined as frozen area." href = "tso-t-usr-sizing-manuCond-frozAreaDef.htm">Defining Frozen Areas</a></li><li><a title = "Shell thicknesses can be controlled to vary between a lower or upper bound" href = "tso-t-usr-sizing-manuCond-shellThickBound.htm">Defining a Shell Thickness Bound</a></li><li><a title = "Shell thicknesses can be clustered to have equal values in certain areas (in each element group) during the optimization (CHECK_TYPE = CLUSTER_GROUPS). Clustering reduces the number of design variables (without influence on calculation time)." href = "tso-t-usr-sizing-manuCond-clustGrp.htm">Defining Cluster Groups</a></li><li><a title = "Small sheet parts in the resulting structure are often undesirable. Defining a minimum sheet width (minimum cluster width) avoids the creation of small substructures in the final result (" href = "tso-t-usr-sizing-manuCond-widContr.htm">Defining Width Control (Minimum Cluster Width)</a></li><li><a title = "Different symmetry conditions can be defined for an optimization in SIMULIA Tosca Structure. They can be used for obtaining symmetrical results using nonsymmetrical meshes, saving the processing time for the FE-calculation. In addition, symmetrical load case can often be reduced in the FE model." href = "tso-t-usr-sizing-manuCond-symCond.htm">Defining Symmetry Conditions</a></li><li><a href = "tso-c-usr-sizing-manuCond-TipsRestr.htm#tso-c-usr-sizing-manuCond-TipsRestr">Tips on Defining Restrictions</a></li></ul></td></tr></table></td></tr></table> 
  
 
   
  
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