<?xml version='1.0' encoding='UTF-8' ?>
<!DOCTYPE html
  SYSTEM "about:legacy-compat">
<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 = "concept"/><meta name = "description" content = "This section covers known issues for topology optimization."/><meta name = "DC.format" content = "HTML5"/><meta name = "DC.identifier" content = "tso-c-example-topo-conArmTroubShoot"/><meta name = "DC.language" content = "en"/><link rel = "stylesheet" type = "text/css" href = "../DSDocUI_XML34.css"/><title>Troubleshooting</title>
<script type = "text/javascript" src = "../DSDocUI_Highlight34.js">
  	/* */
  	</script></head><body onLoad = "highlightSearchTerms();" id = "tso-c-example-topo-conArmTroubShoot">
<a name = "hj-top"> </a><table class = "table1" id = "table11"><tr><td><table class = "DocHeader"><tr><td class = "DocHeader1" colspan = "2"><h1>Troubleshooting</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 section covers known issues for topology optimization.
<p>This page discusses: </p><ul><li><a href = "#tso-c-example-topo-conArmTroubShoot__cs-WrongconnectioninProjectSchematic" id = "toc_rg" title = "">Wrong Connection in Project Schematic</a></li><li><a href = "#tso-c-example-topo-conArmTroubShoot__cs-Optimizationstrategy" id = "toc_rg" title = "">Optimization Strategy</a></li></ul>
</p></td></tr></table></td></tr></table>





<div class = "body conbody">
<div class = "section" id = "tso-c-example-topo-conArmTroubShoot__cs-WrongconnectioninProjectSchematic"><h2 class = "title sectiontitle">Wrong Connection in Project Schematic</h2>

<p>Make sure the <span class = "ph">Tosca Structure</span>
Optimizer has all the input it needs: Engineering Data, Geometry, Model. Loads cannot be specified in a stand-alone
<span class = "ph">Tosca Structure.topology</span> system.</p>
</div>

  
<div class = "section" id = "tso-c-example-topo-conArmTroubShoot__cs-Optimizationstrategy"><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">Optimization Strategy</h2>

<p>The controller-based algorithm is developed to solve a volume constraint / stiffness
maximization. For problems involving Displacement or Member Size
Control, for example, a sensitivity-based algorithm is needed.
At the same time, controller-based algorithm solutions work with equality constraints
while the sensitivity-based algorithm handles inequality constraints
like greater or less than a certain value.</p>
<p>To receive appropriate solutions, approximately 15 design cycles / iterations
are needed for the controller strategy and 35-45 cycles for the sensitivity strategy. Otherwise the solver will not converge.</p>
</div>

</div>

</td></tr></table><script type = "text/javascript" src = "../DSDocUI_Bottom34.js">/* */</script></body>
</html>
