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THREE FACTORIZATIONS IN A ROW FAILED. CHECK THE MODEL. IT IS POSSIBLE THAT THE MODEL CONTAINS THE KINEMATIC COUPLING DEFINITION SET UP IN A WAY THAT A DEGREE OF FREEDOM HAS NEITHER MASS NOR STIFFNESS

Since we have following text in the doc, I think the answer is yes, but I can not make it work. Defining elastic connector behavior in linear perturbation procedures Available components of relative motion with connector elasticity use the linearized elastic stiffness from the base state. In...

Thanks a lot! I now understand what is happened.

Hello, everyone! I am trying to using nonlinear spring elements in a FEM model, but first I want to run some test problems. I found nonlinear spring elements produced much smaller amplitude than analytical solution for SDF system. The problem is defined as following: *Heading ** ** PARTS **...