I don't believe you can have a force's direction change/update in say a linear dynamic model, but am curious if there's a way. The best/only way I've found is to use Motion Analysis, but it will only compute stress for a single part. It's nice to have an Action & Reaction force to use the moving part against a fixed part to have the direction update, but I can't see a way to set this in SWSim. If I set a force direction based on a 3D sketch, for starters there's no good way to make the active part move, secondly I'd think the 3D sketch and subsequently the force direction won't update for each iteration even if the part did move.
Does anyone have any experience with this setup? I know I can run sims at various points in the motion statically, but I'm interested more in the frequency response. The long work-around would be to have force-time curves applied at multiple points, turning each on and off to simulate the force moving. This just seems extremely excessive, wondering if there is a better way.