*DESIGN RESPONSE

Specify responses for design sensitivity analysis.

This option is used to write the sensitivities in a design sensitivity analysis. The use of this option depends on the type of design sensitivity analysis: direct or adjoint.

For a direct design sensitivity analysis, this option is used to write the sensitivities of contact, element, nodal, and/or eigenmode responses to the output database. The CONTACT RESPONSE, ELEMENT RESPONSE, and/or NODE RESPONSE options can be used in conjunction with this option in a direct design sensitivity analysis.

For an adjoint sensitivity analysis, this option is used to write the design response and sensitivities of global, element, or nodal responses to the output database. The GLOBAL RESPONSE, ELEMENT RESPONSE, or NODE RESPONSE option must be used in conjunction with this option in an adjoint design sensitivity analysis.

This page discusses:

 

See Also
Direct Design Sensitivity Analysis
Adjoint Design Sensitivity Analysis
*CONTACT RESPONSE
*ELEMENT RESPONSE
*NODE RESPONSE
*GLOBAL RESPONSE

Specifying design responses for a direct design sensitivity analysis

Optional parameters

FREQUENCY

Set this parameter equal to the output frequency of the response sensitivities. The output will always be written to the output database at the last increment. If this parameter is omitted, output will be written at every increment of the analysis. Set FREQUENCY=0 to suppress output of the response sensitivities. This parameter also controls the frequency of the sensitivity calculations for the total DSA formulation.

MODE LIST

Include this parameter to indicate that a list of eigenmodes for which sensitivities are desired will be listed on the data lines. This parameter is valid only in a FREQUENCY procedure.

Data lines to list desired eigenmodes if the MODE LIST parameter is included

First line

  1. Specify a list of desired eigenmodes.

Repeat this data line as often as necessary to list all desired eigenmodes.

Specifying design responses for an adjoint design sensitivity analysis

Required parameters

NAME

Set this parameter equal to the label that will be used to refer to this design response on the output database. Design response names in the same input file must be unique.

Optional parameters

TIME MARKS

This parameter is relevant only in a transient dynamic (DYNAMIC) analysis.

Set TIME MARKS=YES (default) to write the design response and corresponding sensitivities to the output database at the exact times dictated by the TIME POINTS parameter.

Set TIME MARKS=NO to write the design response and corresponding sensitivities to the output database at the last increment of the step.

TIME POINTS

This parameter is relevant only in a transient dynamic (DYNAMIC) analysis.

Set this parameter equal to the name of the TIME POINTS option that defines the time point at which the design response and corresponding sensitivities are to be written. The time points specification can contain only a single time point.

There are no data lines associated with this option.