1. I did two Modal analyses, one had the result you show, which is more relevant, and one was of the moving piece alone, which was 33 kHz.

Tell me how did you do it? It doesn't work for me either.

  1. Let the simulation run for a few weeks. The impacts will continue until there are no more bounces and the part has come to rest.

You did not understand me. In life, two pipes are connected by grooves and dowels. And they can hit many times. Can I set fall speed and return displacement 25 times?