chiheb ben abdallah

hello chandra sekaran

thank you for answering,

 i did a modal analysis and i set 'static structural' is pre-stress and it worked well. when  i tried to perform harmonic analysis and i set modal in initial conditions , the simulation failed and the warning message 'one or more contact regions has been defined as non linear contact' appeared. can you please tell me how to solve this problem and how to do solution combination?