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Sensitivity stiffness matrix or mass matrix (SOL 200?)

Hi,

 

For achieving some uncertainties studies, I need to evaluate the sensitivity stiffness matrix or sensitivity mass matrix with respect to the design parameters (in my case, the design parameters are material properties). My question is very simple: can I extract these matrices?

My idea was to introduce an optimization problem by using the SOL 200 procedure. In principle, I can extract the sensitivities of the objective function but if I can do this wit matrices.