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<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 = "topic"/><meta name = "abstract" content = "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."/><meta name = "description" content = "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."/><meta name = "DC.format" content = "HTML5"/><meta name = "DC.identifier" content = "tso-m-user-TopOpt-DesArea-FrozArea-sb"/><meta name = "DC.language" content = "en"/><link rel = "stylesheet" type = "text/css" href = "../DSDocUI_XML34.css"/><title>Frozen Areas</title>
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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>Frozen Areas</h1></td></tr><tr><td class = "DocHeader4" colspan = "2"/></tr><tr><td class = "DocHeader3" colspan = "2"><table class = "DocThemeIntro" id = "table12"><tr><td class = "Intro1"><p class = "header"><p class = "abstract"><span class = "shortdesc">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. </span>
</p>

</p><hr class = "header"/></td></tr><tr><td class = "Intro2"><span class = "run-in">In this section:</span><br/><ul class = "ulthemes"><li><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">About Frozen Areas</a></li><li><a title = "You can define element groups as the frozen area to maintain material in certain parts of the design area, such that they remain unchanged in the optimized model." href = "tso-t-user-TopOpt-DesArea-ManufCond-frozArea.htm">Defining Frozen Areas for Topology Optimization</a></li></ul></td></tr></table></td></tr></table>
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