Defining frequency dependent constraint in Nastran sol 200

Hi,

I want to define a constraint for a topology optimization problem that uses frequency value (Nastran sol 200). In the other word the constraint will update for every frequency value during a forced response analysis for each optimization loop. How can I fetch and use frequency value for this job? how can I define a frequency dependent constraint? the costraint formulation is : w^2/8000 , w:frequency

thanks.