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.