I am dealing with a highly nonlinear dynamic system and results do always diverge from the empirical results, The question is SOFA tailored for the linear system? even if I do linearization it does not capture what happens in reality.
The first feature to consider is the time step. You need to use a sufficiently small time step so that a solution can be found.
With a highly nonlinear dynamic system, convergence can be difficult to reach, even with a small time step. Especially, if you are doing one Newton step per time step which is the case in most SOFA schemes. Only two schemes allow for defining the number of Newton step in one time step:
– the StaticSolver
– the VariationalSymplecticSolver
The latter should work in your dynamic case.
I hope this helps.
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