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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>Update of Optimization Displacement Vectors (VECTOR)</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">It is described how to influence the update of the optimization
directions.</span>

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<p>An optimization
displacement vector is determined by the optimization algorithm for every
design node. This vector graphically corresponds to the outer surface
unit normal of the nodes and indicates the optimization displacement
direction. Restrictions influencing the direction (<code class = "ph codeph">DVCON_BEAD</code>
with <code class = "ph codeph">CHECK_DOF</code> and <code class = "ph codeph">CHECK_BC</code>) are included when calculating
the optimization displacement vectors. </p><p>The <code class = "ph codeph">VECTOR</code> parameter enables the user to specify the design cycle that
   determines the optimization displacement vectors:</p>
<pre class = "codeblock">
<code class = "ph codeph">OPT_PARAM
</code><code class = "ph codeph"> ...
 VECTOR = FIRST
 ...
</code><code class = "ph codeph">END_
</code></pre>
<table class = "Remark" id = "table132"><tr><td class = "Remark"><span class = "run-in.important">Important:
				</span><span class = "notecontent"><p>The optimization displacement direction of the start model is used in bead optimization. As bead
    designed sheet metal structures are manufactured by a deep drawing process, generated undercuts
    would lead to a nonmanufacturable design. This might be avoided by updating the optimization
    displacement direction with each iteration (<code class = "ph codeph">VECTOR = EVER</code>).</p></span></td></tr></table>

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