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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>Settings for the General Sensitivity-Based Optimization</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"> There are different settings available to control the speed and convergence behavior of the topology optimization algorithms.
This section discusses some settings concerning general sensitivity-based optimization.</span>

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</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 = "It is possible to apply a simple mode tracking function for the modal analysis using the modal assurance criterion (MAC) including a mass weighting. An example is given in the Tosca Structure Examples Guide" href = "tso-c-user-TopOpt-Sett-Sensi-ModTrack.htm">Mode Tracking</a></li><li><a title = "The relative density of each element is the design variable in topology optimization. In the initial optimization iteration, the design space has a homogenous material distribution, meaning that each element contains the same relative material volume." href = "tso-c-user-TopOpt-Sett-Sensi-InitDen.htm">Initial Values of Density (DENSITY_INITIAL)</a></li><li><a title = "The SOFT_DELETE option offers the possibility of removing soft elements based on different criteria." href = "tso-c-user-TopOpt-Sett-Sensi-RemSoft.htm">Removing Soft Elements for Increasing Performance (SOFT_DELETE)</a></li><li><a title = "In topology optimization, each relative material volume is constrained by a lower and an upper bound." href = "tso-c-user-TopOpt-Sett-Sensi-LimDesCha.htm">Limits for Design Variables and Changes</a></li><li><a title = "The relative material volumes of elements of the structure are updated using the method of Convex Separable Approximations (CSA), see Svanberg (2002)." href = "tso-c-user-TopOpt-Sett-Sensi-SCSA.htm">Update Strategy of the Convex Separable Approximations</a></li><li><a title = "To obtain a mesh-independent result from the optimization, SIMULIA Tosca Structure has a filter technique implemented to avoid mesh dependence." href = "tso-c-user-TopOpt-Sett-Sensi-MF.htm">Settings of the Mesh Filter</a></li><li><a title = "The filter technique for the objective and constraint functions can be changed using the parameter FILTER_TYPE in the optimization settings (OPT_PARAM command)." href = "tso-c-user-TopOpt-Sett-Sensi-FilTyp.htm">Filter Settings</a></li><li><a title = "This section introduces the different interpolation schemes available in Tosca Structure." href = "tso-c-user-TopOpt-Sett-Sensi-MatInt.htm">Material Interpolation</a></li></ul></td></tr></table></td></tr></table>



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