2. Benchmark solution

The reference solution uses a modal base enriched with static modes without the use of the « ORTHO = OUI » option.

The concatenation is done by two successive calls to the DEFI_BASE_MODALE command. The first is used for concatenating static modes with the « RITZ » keyword. The second is used with the keyword « ORTHO_BASE » to orthonormalize.

The results of movement along the Z axis are post-processed at the free end node.