I have a set of bushings which have highly nonlinear stiffness (but elastically so). I would like to use nonlinear analysis with a nonlinear force vs displacement curve to get the correct stiffness of these fasteners for use in a natural frequency analysis.
Aside from running a nonlinear solution and manually checking the displacement of each fastener end-point, and then entering the correct stiffness separately for each fastener, is it possible to use nonlinear results to define the stiffness matrix used in a natural frequency analysis in FEMAP?
Solved! Go to Solution.
I guess you need to run a pre stresseed modal analysis. There are some issues in internet. What I have it is not in english