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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>About the Beam with Symmetry Restrictions Example
</h1></td></tr><tr><td class = "DocHeader4" colspan = "2"/></tr><tr><td class = "DocHeader3" colspan = "2"><table class = "DocThemeIntro" id = "table12"><tr><td class = "Intro1Only"><p class = "shortdesc">This example shows how to add symmetry conditions to a
standard stiffness optimization task.<p>This page discusses: </p><ul><li><a href = "#tso-c-example-sizing-beamSym__cs-AbouttheModel" id = "toc_rg" title = "">About the Model</a></li><li><a href = "#tso-c-example-sizing-beamSym__cs-ProcedureSummary" id = "toc_rg" title = "">Procedure Summary</a></li></ul>
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<div class = "section" id = "tso-c-example-sizing-beamSym__cs-AbouttheModel"><h2 class = "title sectiontitle">About the Model</h2>

<p>The beam in this example is more finely meshed than in the previous
example.
The definition of the symmetry plane, of the symmetry point or of
cyclic symmetry needs to include a reference coordinate system.
This definition can be made with the CS_DEF command. If the
coordinate system is defined in the model it can be imported. The
origin of the coordinate system is in the middle of the design
area.</p>
<p><br/><img class = "image" src = "../TsoExampleImages/sizingBeamSymModel.png"/><br/></p>
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<div class = "section" id = "tso-c-example-sizing-beamSym__cs-ProcedureSummary"><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 sectiontitle">Procedure Summary</h2>

<p>
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<tr class = "row">
<td class = "entry">Model:</td>
<td class = "entry">beam_sym.ext</td>
</tr>
<tr class = "row">
<td class = "entry">Design Area:</td>
<td class = "entry">All elements</td>
</tr>
<tr class = "row">
<td class = "entry">Design Variable Constraint:</td>
<td class = "entry">Lower (0.1) and upper (2.0) bound for shell thicknesses</td>
</tr>
<tr class = "row">
<td class = "entry">Design Variable Constraint:</td>
<td class = "entry">Symmetry restriction</td>
</tr>
<tr class = "row">
<td class = "entry">Objective:</td>
<td class = "entry">Maximize stiffness (minimize compliance)</td>
</tr>
<tr class = "row">
<td class = "entry">Constraint:</td>
<td class = "entry">Relative volume of 120 % (inequality constraint)</td>
</tr>
</tbody></table>
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