Response to SRS input

[izax1]

Hi
Is it possible that a SRS input of 2G responds with almost 0 stresses. (actually 0,004MPa) The SRS has a max acce between 0,6 and 0,9 Hz, whereas the lowest natural frequency of the system is at 4,2 Hz. Appreciate any help here.

 

[Erik Panos Kostson]

Well the dynamic stiffness is almost equal the static here (you are below first reso. and assuming that damping is not influencing at 0.6-0.9 Hz)), so just do the calcs./analysis as linear static (not dynamics) with the above acceleration imposed and that should give you the same stress as in the dynamics.