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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 Design Area</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">During an optimization, only part of the model might be allowed to changed. This part is defined as the design area.
<ul><li><a href = "#tso-c-user-TopOpt-DesArea__" id = "toc_rg" title = "">Example</a></li></ul>
</p></td></tr></table></td><td class = "DocHeader2"><table class = "DocTopicsSeeAlso" id = "table13"><tr><td class = "TopicsTitle">See Also</td></tr><tr><td><a title = "You can define the Design Area to denote the set of elements that might be removed during the topology optimization. In contrast you can define frozen areas that remain unchanged." href = "tso-t-user-TopOpt-DesArea.htm#tso-t-user-TopOpt-DesArea">Defining the Design Area for Topology Optimization</a></td></tr><tr><td><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-c-user-TopOpt-frozArea.htm#tso-c-user-TopOpt-frozArea">About Frozen Areas</a></td></tr></table></td></tr></table>




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<p>In topology optimization, the design area denotes the set of elements that might be removed during the optimization, 
   in contrast to the frozen areas  that remain unchanged.</p>
<p>The model for the topology optimization is modified in such a way that the inner areas of the component are filled
   with elements to create a design area where the optimization system can remove or rearrange elements for 
   better structural performance.</p>
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<p>The following start model for topology optimization represents a design of a control arm for a car. 
   The component must be manufactured by forging and consists of aluminum. The red areas of the component 
   are not free for the optimization because they are used for the fixtures and for the load application. 
   One red area is used for the mounting of a sensor for the headlight range adjustment.</p>
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                      <p>Green: Design Area</p>
	                  <p>Red: Frozen Area</p></td>
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