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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> Example: Minimizing the Energy Stiffness Measure</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 = "header"><p class = "abstract">
<span class = "shortdesc">
The task for this example is to maximize the stiffness by
minimizing the energy stiffness measure subject to a mass constraint
of 35%.
</span>

</p>
<p>This task shows you how to:
					</p><ul><li><a href = "#tso-t-usr-terms-dresps-enStiffMsrExpl-gui" id = "toc_rg" title = "">Minimizing the Energy Stiffness Measure in <span class = "ph">Tosca Structure.gui</span></a></li><li><a href = "#tso-t-usr-terms-dresps-enStiffMsrExpl-paraFile" id = "toc_rg" title = ""><span class = "ph">Tosca Structure</span> Parameter File</a></li></ul>
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<div class = "body taskbody">
<section><div class = "li step p">

Varying prescribed displacements are assigned as shown in the figure
below:<br/><img border = "1" class = "image" src = "../TsoUserImages/terms_enStiffMsrExpl.png" width = "450" height = "270"/><br/>

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<article class = "topic task nested1" aria-labelledby = "ariaid-title2" id = "tso-t-usr-terms-dresps-enStiffMsrExpl-gui">
<h2 class = "title topictitle2">Minimizing the Energy Stiffness Measure 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 menucascade"><span class = "ph uicontrol">Command</span><abbr title = "and then"> &gt; </abbr><span class = "ph uicontrol">DRESP</span></span>.
</li><li class = "li step">Choose <span class = "ph menucascade"><span class = "ph uicontrol">Type</span><abbr title = "and then"> &gt; </abbr><span class = "ph uicontrol">ENERGY_STIFF_MEASURE</span></span>.
</li><li class = "li step">
Select <span class = "ph uicontrol">ALL_ELEMENTS</span> in the dropdown menu <span class = "ph uicontrol">Elementgroup</span>.
<br/><img class = "image" src = "../TsoUserImages/terms_enStiffMsrExplGui.png" width = "604" height = "238"/><br/></li><li class = "li step">To choose <span class = "ph">load case</span>
click <span class = "ph uicontrol">Add LC</span>. In the field <span class = "ph uicontrol">Load case number</span>,
enter 2.
</li><li class = "li step">
Choose <span class = "ph menucascade"><span class = "ph uicontrol">Command</span><abbr title = "and then"> &gt; </abbr><span class = "ph uicontrol">OBJ_FUNC</span></span>.
</li><li class = "li step">Click <span class = "ph uicontrol">Add Dresp</span> and choose the previously defined
design response for energy stiffness measure: <br/><img class = "image" src = "../TsoUserImages/terms_enStiffMsrExplObjFuncGui.png" width = "450"/><br/>
</li></ol></section></div>
</article>

<article class = "topic task nested1" aria-labelledby = "ariaid-title3" id = "tso-t-usr-terms-dresps-enStiffMsrExpl-paraFile">
<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"><span class = "ph">Tosca Structure</span> Parameter File</h2>

<div class = "body taskbody">
<section><div class = "li step p">The resulting command in the parameter file look like follows:
<p>
<pre class = "codeblock">
DRESP
  ID_NAME               = ...
  DEF_TYPE              = SYSTEM
  TYPE                  = ENERGY_STIFF_MEASURE
  EL_GROUP              = ALL_ELEMENTS
  GROUP_OPER            = SUM
END_
</pre>
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