Thanks for your replies.
As ThomasH was correctly saying, there's actually a command that make Nastran calculate everything in a relative coordinate system, rather than absolute, and this solved my problem.
FYI see PARAM, ENFMOTN, REL
It only works with the modal transient (not direct)...
Hi guys.
I'm trying to solve the following issue: we have a racecar with a rear wing, whose supports fail (or crack) after few races. The static analysis didn't show any problem, so it's evidently a fatigue issue. We have accelerometers in the car, bonded just next to the wing support's...
