I build a model 3D model and defined linear transformations as outlined in the online manual, and with local y's defined upwards. The gravity load checked out ok. I then switched to corotational transformations, and the gravity load suddenly didn't check out anymore. It appears that the local y axes of some elements changed after just switching transformation methods. There were no discrepancies when only using nodal loads. Further investigation confirmed that, with corotational transformations used, the some of the local y's were changed to downward. Has this been seen before? Am I doing something wrong?
I have run into a problem with axially distributed loads with corotational transformation before, but had never noticed the current issue before. Can you confirm that distributed loads in all directions are unreliable with corotational transformations? Thanks so much
Thanks for your reply; that is odd though. When I remove all loads except the eleload on one beam, using corotational transformation, I see a load. The load, which is verified as pointing directly downward by analyses with linear transformations, appears to act vertically upward when using corotational.
From here out, I won't try using any eleloads on elements with corotational transformations. Thanks