Thank you for your reply Dr. Koutras. I will work to fix the implicit then.

I have two more questions about the problem:


  • the analysis did not “perfectly” overlapped even using 1/20*T. Should I also consider that as “okay”?



  • When should I use the keyword deck *BOUNDARY_PRESCRIBED_MOTION rather than *LOAD_BODY_X? As in my small experience, I have seen that using the former deck (setting VAD=1) the whole system moves away from the initial coordinates, so I get a response which increases as the time increases.