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FAQ 003008 EN

15 October 2019

Frank Faulstich Calculation RFEM

What is the use of the nonsymmetric solver?

Answer

The nonsymmetric solver is able to improve the convergence. However, it should only be activated if there are really convergence problems.

For certain material models, you can also be requested to activate the nonsymmetric solver.

In the case of the "normal" equation solver, it is necessary to only save one side of the matrix as it is symmetric to the main diagonal. In the case of the nonsymmetric solver, it is necessary to save both sides and also create them previously, of course. This requires more memory and longer processing time.

For a model that converges well anyway, the nonsymmetric solver only leads to a longer computing time and is of no use.

Keywords

Solver Stiffness matrix Calculation parameters

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