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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>Defining Mesh Smooth Areas</h1></td></tr><tr><td class = "DocHeader4" colspan = "2"/></tr><tr><td class = "DocHeader3"><table class = "DocHeaderIntro" id = "table12"><tr><td class = "Intro1"><p class = "shortdesc">
Design variables for shape optimization are defined when assigning
a node group to the design area.
<p>This task shows you how to:
					</p><ul><li><a href = "#tso-t-usr-shape-desArea-smooth-defGui" id = "toc_rg" title = "">
Define a Mesh Smooth Area in <span class = "ph">Tosca Structure.gui</span>
</a></li><li><a href = "#tso-t-usr-shape-desArea-smooth-defCmd" id = "toc_rg" title = "">
Define a Mesh Smooth Area in <span class = "ph">SIMULIA Tosca Structure</span> Parameter file
</a></li></ul>
</p></td></tr><tr><td class = "Intro2"><hr class = "header"/><span class = "run-in-beforeyoubegin">Before you begin: </span>
<ul class = "ul" id = "tso-t-usr-shape-desArea-smoothDef__ul_B8173601FB3F45229E8BA0998E154A82">
<li class = "li">
The recommended procedure is to define <code class = "ph codeph">MESH_SMOOTH</code>
area immediately after defining the design area (see <code class = "ph codeph">DV_SHAPE</code>
command) since the two areas are assigned to one another.
</li>
<li class = "li">
The <code class = "ph codeph">MESH_SMOOTH</code> definition must be activated by
reference in the <code class = "ph codeph">OPTIMIZE</code> command. Nonactivated definitions
have no influence in the optimization. The reference in the <code class = "ph codeph">OPTIMIZE</code>
command assigns the design area (see <code class = "ph codeph">DV_SHAPE</code> command)
and the area for mesh smoothing (see <code class = "ph codeph">MESH_SMOOTH</code> command)
to one another.
</li>
<li class = "li">
It is recommended to define <code class = "ph codeph">MESH_SMOOTH</code> before the
<code class = "ph codeph">DVCON_SHAPE</code> entries or a volume constraint. This enables
the system-defined <code class = "ph codeph">MESH_SMOOTH</code> node group to then
be used for the <code class = "ph codeph">DVCON_SHAPE</code> definitions or the user/system-defined
<code class = "ph codeph">MESH_SMOOTH</code> element group to be used for the definition
of the volume constraint.
</li>
</ul>
</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 nodes for shape optimization." href = "../TsoCmdMap/tso-r-cmd-dvShape.htm#tso-r-cmd-dvShape">DV_SHAPE</a></td></tr><tr><td><a title = "Definition of parameters for the mesh smoothing algorithm for shape optimization." href = "../TsoCmdMap/tso-r-cmd-meshSmooth.htm#tso-r-cmd-meshSmooth">MESH_SMOOTH</a></td></tr></table></td></tr></table>




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<article class = "topic task nested1" aria-labelledby = "ariaid-title2" id = "tso-t-usr-shape-desArea-smooth-defGui">
<h2 class = "title topictitle2">
Define a Mesh Smooth Area 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 |    MESH_SMOOTH</span>
in <span class = "ph">Tosca Structure.pre</span>
screen.

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

In MESH_SMOOTH dialog, choose the element group
for the mesh smooth area and define further settings. <br/><img class = "image" id = "tso-t-usr-shape-desArea-smooth-defGui__image_2D7CF42FE0F140B2B9B6732632D4B3F3" src = "../TsoUserImages/shape_MESH_SMOOTH_gui1.png" width = "450"/><br/>

</li></ol></section>
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</article>
<article class = "topic task nested1" aria-labelledby = "ariaid-title3" id = "tso-t-usr-shape-desArea-smooth-defCmd">
<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">
Define a Mesh Smooth Area in <span class = "ph">SIMULIA Tosca Structure</span> Parameter file
</h2>

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

To define a mesh smooth area  in the parameter file use the <code class = "ph codeph">MESH_SMOOTH</code>
command.

<div class = "itemgroup stepresult">
Each <code class = "ph codeph">MESH_SMOOTH</code> definition has a name (<code class = "ph codeph">ID_NAME</code>
parameter) and references a previously defined element group (<code class = "ph codeph">EL_GROUP</code>
parameter). The name is required in order to subsequently activate the
<code class = "ph codeph">MESH_SMOOTH</code> definition when specifying the optimization
job (see <code class = "ph codeph">OPTIMIZE</code> command). The area for the mesh smoothing
is specified by the element group. These two declarations are mandatory.
<p>A typical <code class = "ph codeph">MESH_SMOOTH</code> command appears as follows:
</p><pre class = "codeblock">
<code class = "ph codeph">
MESH_SMOOTH
 ID_NAME  = mesh_smooth_name
 EL_GROUP = elem_group_name
 ...
END_
</code>
</pre>
<p>All other declarations are optional and are used for additional specifications
in the <code class = "ph codeph">MESH_SMOOTH</code> definition by the user.</p>
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