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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 Rib Design Oil Pan 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 the basic workflow for a sensitivity-based topology optimization with
        rib design restrictions with an oil pan model. <p>This page discusses: </p><ul><li><a href = "#tso-c-example-topo-sens-Rib-Oil__" id = "toc_rg" title = "">About the Model</a></li><li><a href = "#tso-c-example-topo-sens-Rib-Oil__cs-ProcedureSummary" id = "toc_rg" title = "">Procedure Summary</a></li></ul>
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<div class = "body conbody">
<div class = "section"><h2 class = "title sectiontitle">About the Model</h2>

<p>The considered model is a oil pan for stiffness optimization.</p>
<p>The initial model is encastered at the nodes in the blue region (see image below). An inward pressure load acts of the bottom and side walls of the structure.
<br/><img class = "image" src = "../TsoExampleImages/sensTopoRibOilModel.png" width = "567"/><br/></p>
<p>The surface elements except for the top part considered frozen during the optimization such that the infill region is the design domain.</p>
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<div class = "section" id = "tso-c-example-topo-sens-Rib-Oil__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>

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<table class = "table"><caption/><colgroup><col style = "width:13.071895424836603%"/><col style = "width:86.9281045751634%"/></colgroup><tbody class = "tbody">
<tr class = "row">
<td class = "entry">Model:</td>
<td class = "entry">topo_ribs_oilpan.ext</td>
</tr>
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<td class = "entry">Design Area:</td>
<td class = "entry">All elements except frozen regions</td>
</tr>
<tr class = "row">
<td class = "entry">Design Variable Constraint:</td>
<td class = "entry">Fix regions of frozen elements</td>
</tr>
<tr class = "row">
<td class = "entry">Design Variable Constraint:</td>
<td class = "entry">Rib pattern restriction on all elements in the design area</td>
</tr>
<tr class = "row">
<td class = "entry">Objective:</td>
<td class = "entry">Minimize compliance</td>
</tr>
<tr class = "row">
<td class = "entry">Constraint:</td>
<td class = "entry">None</td>
</tr>
<tr class = "row">
<td class = "entry">Iterations:</td>
<td class = "entry">100</td>
</tr>
</tbody></table>
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