Keyword type: step
This procedure is used to perform a sensitivity analysis. There is one optional parameter NLGEOM. If active, the change of the stiffness matrix w.r.t. the design variables is performed based on:
It makes sense to include NLGEOM if it was used on a previous static step and not to include it if it was not used on a prevous static step or in the absense of any prevous static step.
Notice that the objective functions SHAPE ENERGY, MASS and DISPLACEMENT require a previous *STATIC step, EIGENFREQUENCY requires a previous *FREQUENCY step, possibly preceded by a *STATIC step, cf. *OBJECTIVE.
First line:
Example: *SENSITIVITY
defines a linear sensitivity step.
Example files: beampic, beampis.