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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> Solver Specific Features</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">
This chapter describes the formats and functionalities of
the different solvers supported by <span class = "ph">SIMULIA Tosca Structure</span>.
The topological and physical properties of the analysis model (finite
element input file) are required for the optimization of an FE model.
Normally, not all information contained in the analysis model is necessary
for an optimization. The optimization module returns the modified model
data to the FE solver. The node coordinates are changed during shape
and bead optimization. New materials and element properties are generated
during topology optimization and the assignments of the elements to the
material definitions and material properties are changed. Therefore,
there are very few restrictions to the FE modeling (finite element input
file).
</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 = "The FE input file (finite element input file) is processed in two ways during the optimization procedure. Initially, the optimization preprocessing step reads the FE input file and all necessary information is written into the optimization database. Afterwards, in each optimization iteration only the properties changing during the optimization will be modified in the FE input file." href = "tso-c-usr-solver-ov.htm">Overview</a></li><li><a title = "Within this section, the Abaqus solver is considered. All relevant file name conventions and settings are explained." href = "tso-m-usr-solver-abaqus-sb.htm">Abaqus</a></li><li><a title = "Within this section, the ANSYS® solver is considered. All relevant file name conventions and settings are explained." href = "tso-m-usr-solver-ansys-sb.htm">ANSYS®</a></li><li><a title = "Within this section, the MSC Nastran® solver is considered. All relevant file name conventions and settings are explained." href = "tso-m-usr-solver-mscNastran-sb.htm">MSC Nastran®</a></li><li><a title = "Within this section, the CST solver is considered. All relevant file name conventions and settings are explained." href = "tso-m-usr-solver-cst-sb.htm">CST</a></li><li><a title = "The homogenization of the stresses on a components surface often indirectly leads to a reduction of the maximum damage in these areas. In SIMULIA Tosca Structure, a durability analysis can be included in the optimization loop. The direct use of damage results for the homogenization strategy leads to a minimization of the maximum damage in the critical areas. In SIMULIA Tosca Structure, the damage values must be provided as equivalent stress values. The coupling of a durability analysis enables the consideration of the load-time histories. The notions fatigue, durability, and life analysis will all be used in the following as the same thing." href = "tso-m-usr-solver-durab-sb.htm">Shape Optimization Based on a Durability Analysis</a></li></ul></td></tr></table></td></tr></table>




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