Jorge MB,


I recently read the following newsletter with an example of time history analysis (steam hammer due to sudden valve closure). It could be helpful even if you decide to perform a quasi static analysis.

http://www.coade.com/Uploads/mechanical-engineering-news/jun94.pdf

Also, if you have a pressure wave traveling upstream, I would expect the direction of the loads to be +X load @ node 60, -Y load @ node 50, +Z load @ node 40 and so on. Someone please correct me if I'm wrong at this point.