Define Design Variables dialog box – Geometry Optimization

Design Variables
Design variables category list	Specifies the type of design variable that you want to define. Design variables are independent quantities that you can vary to achieve the optimum design.Section Properties — Lets you select beam cross section dimensions, if your finite element model contains 1D beam meshes.Shell Properties — Lets you select shell thickness properties from the physical properties for the mesh, if your finite element model contains 2D shell meshes. Optimization can only update a constant shell thickness property across a 2D mesh. You cannot select:Shell thicknesses defined on individual elements using Element Associated Data.Variable shell thicknesses defined from a midsurface or field.Feature Dimensions — Lets you select geometry feature dimensions, such as fillet radius.Sketch Dimensions — Lets you select sketch dimensions, if your model contains a sketch.Expressions — Lets you select expression values, if your model contains expressions.
Attribute list	Displays design variables that can be selected for a specific problem. The available list depends on the selected design variable category. For example, if you selected Section Properties , the list contains the beam cross sections defined in your FEM, such as Section 1, Section 2, Section 3, and so on.
Quantity list	Displays parameters that correspond to the selected design variable in Feature Dimensions. You can select one or more of these parameters to optimize a specific problem.
Parameters
Define limits by percentage	Activates the Percent Value option.
Percent Value	Sets a percentage value for the limit range.
Limit Type	Sets the limit type to Upper or Lower. Upper and lower limits define a range of variation and serve as constraints on the allowable amount of change.
Limit Value	Specifies the value to limit. This upper or lower limit is the response criteria that the software is not allowed to violate when converging on an optimization solution.
Unit	Specifies the unit of measure for the Limit Value.
Global Sensitivity Design Variable
Activate for Global Sensitivity	Available when the Process Type is set to Global Sensitivity.Specifies that this design variable will be analyzed for the sensitivity study.

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Define Design Variables dialog box – Geometry Optimization, Simcenter 3D 2021.1 Series

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