Filter Settings

The filter technique for the objective and constraint functions can be changed using the parameter FILTER_TYPE in the optimization settings (OPT_PARAM command).

This page discusses:

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OPT_PARAM

Filter Type

The FILTER_TYPE can be set to AUTO, SENS, DV, or DV_LEGACY, respectively.

AUTO defines automatic selection of the applied filter type as recommended by SIMULIA Tosca Structure.

The option SENS applies the filter to the sensitivities.

The option DV applies the filter to the design variables.

Using the option DV_LEGACY, applies an older version of the design variable filter. Use this option to achieve similar results to version 2020x and before.

Important:
  • Changing the filter type has no effect when the objective is to minimize the mass.
  • Changing the filter type has no effect when manufacturing constraints are present.

Filter Group

The FILTER_GROUP can be set to AUTO, ALL, or DESIGN_AREA, respectively.

AUTO defines automatic selection of element groups to be filtered as recommended by SIMULIA Tosca Structure.

The option ALL lets the filter take all elements into account.

The option DESIGN_AREA defines that only the elements that are contained in the design area are taken into account when filtering.