<?xml version='1.0' encoding='UTF-8' ?>
<!DOCTYPE html
  SYSTEM "about:legacy-compat">
<html xmlns:mml = "http://www.w3.org/1998/Math/MathML" lang = "en"><head><meta charset = "UTF-8"/><meta name = "copyright" content = "(C) Copyright 2020"/><meta name = "DC.rights.owner" content = "(C) Copyright 2020"/><meta name = "DC.type" content = "task"/><meta name = "description" content = "For each optimization problem, the design variables represent the values to be changed during the optimization."/><meta name = "DC.relation" scheme = "URI" content = "../TsoCmdMap/tso-r-cmd-dvSizing.htm#tso-r-cmd-dvSizing"/><meta name = "DC.format" content = "HTML5"/><meta name = "DC.identifier" content = "tso-t-usr-sizing-desVar"/><meta name = "DC.language" content = "en"/><link rel = "stylesheet" type = "text/css" href = "../DSDocUI_XML34.css"/><title>Defining Design Variables (DV_SIZING)</title>
<script type = "text/javascript" src = "../DSDocUI_Highlight34.js">
  	/* */
  	</script></head><body onLoad = "highlightSearchTerms();" id = "tso-t-usr-sizing-desVar">
<a name = "hj-top"> </a><table class = "table1" id = "table11"><tr><td><table class = "DocHeader"><tr><td class = "DocHeader1" colspan = "2"><h1>Defining Design Variables (DV_SIZING)</h1></td></tr><tr><td class = "DocHeader4" colspan = "2"/></tr><tr><td class = "DocHeader3"><table class = "DocHeaderIntro" id = "table12"><tr><td class = "Intro1Only"><p class = "shortdesc">For each optimization problem, the design variables represent the values to be changed during the optimization.<p>This task shows you how to:
					</p><ul><li><a href = "#tso-t-usr-sizing-desVar-gui" id = "toc_rg" title = "">
Design Variable Definition in <span class = "ph">Tosca Structure.gui</span>
</a></li><li><a href = "#tso-t-usr-sizing-desVar-parFile" id = "toc_rg" title = "">
<span class = "ph">SIMULIA Tosca Structure</span> Parameter File
</a></li></ul>
</p></td></tr></table></td><td class = "DocHeader2"><table class = "DocTopicsSeeAlso" id = "table13"><tr><td class = "TopicsTitle">See Also</td></tr></table><table class = "DocTopicsInOtherGuides" id = "table14"><tr><td height = "8px"/></tr><tr><td class = "TopicsTitleNormal">In Other Guides</td></tr><tr><td><a title = "Definition of the design elements for sizing optimization." href = "../TsoCmdMap/tso-r-cmd-dvSizing.htm#tso-r-cmd-dvSizing">DV_SIZING</a></td></tr></table></td></tr></table>




<div class = "body taskbody">
<div class = "section context"><p class = "context"><span class = "run-in.context">Context: </span>
<p>
The elemental thicknesses of shell elements are the design variables
for the sizing optimization in <span class = "ph">SIMULIA Tosca Structure</span>.
The thicknesses change during the optimization in order to fulfill the
optimization goals. The following figure shows design variables for sizing:
</p>
<table class = "table" id = "tso-t-usr-sizing-desVar__aa804596"><caption/><colgroup><col/></colgroup><tbody class = "tbody">
<tr class = "row">
<td class = "entry">
<br/><img class = "image" id = "tso-t-usr-sizing-desVar__image_A5D98E4E9C59421392FBBDDE286CD2AC" src = "../TsoUserImages/sizing_dv.png" width = "450"/><br/>
</td>
</tr>
</tbody></table>

<p>
Valid design elements are the most typical shell elements. The list
of valid element types for sizing is given in  <a class = "xref" href = "tso-m-usr-solver-sb.htm#tso-m-usr-solver-sb" title = "This chapter describes the formats and functionalities of the different solvers supported by SIMULIA Tosca Structure. The topological and physical properties of the analysis model (finite element input file) are required for the optimization of an FE model. Normally, not all information contained in the analysis model is necessary for an optimization. The optimization module returns the modified model data to the FE solver. The node coordinates are changed during shape and bead optimization. New materials and element properties are generated during topology optimization and the assignments of the elements to the material definitions and material properties are changed. Therefore, there are very few restrictions to the FE modeling (finite element input file).">Solver Specific Features</a>.
</p>
</p></div>

</div>

<div class = "related-links"/>

<article class = "topic task nested1" aria-labelledby = "ariaid-title2" id = "tso-t-usr-sizing-desVar-gui">
<h2 class = "title topictitle2">
Design Variable Definition in <span class = "ph">Tosca Structure.gui</span>
</h2>

<div class = "body taskbody">
<section><ol class = "ol steps"><li class = "li step">

Choose<span class = "ph uicontrol"> Command &gt; DV_SIZING</span>.

</li><li class = "li step">

Assign a previously defined
<span class = "ph uicontrol">Element group</span> to be the design element group for the sizing optimization.
The element group must be a group of elements which are allowed as
design elements for the sizing optimization.
<br/><img class = "image" id = "tso-t-usr-sizing-desVar-gui__image_59BFA7058C2149748FFF403A874F2C1B" src = "../TsoUserImages/size_dv_sizing.png" width = "350"/><br/>

</li></ol></section>
</div>

</article>

<article class = "topic task nested1" aria-labelledby = "ariaid-title3" id = "tso-t-usr-sizing-desVar-parFile">
<p><map name = "FPMap1"><area href = "#hj-top" title = "Back to Top" shape = "rect" coords = "416, 0, 435, 10"/></map><span class = "itemsprite"/></p><h2 class = "title topictitle2">
<span class = "ph">SIMULIA Tosca Structure</span> Parameter File
</h2>

<div class = "body taskbody">
<section><div class = "li step p">

The resulting command is the <code class = "ph codeph">DV_SIZING</code> command:

<div class = "itemgroup stepresult">
<pre class = "codeblock">
<code class = "ph codeph">
DV_SIZING
 ID_NAME  = dv_design_elem
 EL_GROUP = <var class = "keyword varname varname">design_elem</var>
END_
</code>
</pre>

<pre class = "codeblock">

</pre>
</div>
</div></section>
</div>

</article>
</td></tr></table><script type = "text/javascript" src = "../DSDocUI_Bottom34.js">/* */</script></body>
</html>
