The model diagram is as follows：
The first analysis step of the nonlinear statics is used to apply the preload force and the second analysis step refers to the first analysis step to calculate the modal frequencies in the preloaded state.
During the simulation, I changed the stiff_real_val value in the pcont card, but the contact stresses and modal frequencies did not change. I used the experimental modal frequencies as a control. My goal is to get the real value of contact stiffness by changing the value of contact stiffness.
May I ask why the contact stress and modal frequency do not change after changing the values? Which parameters should I change? Also, can I define my own parameters for the tangential contact stiffness, and if so, which parameters should I change?
Best wishes and looking forward to your answers.
