5. Summary of results

The test case is an example of the implementation of static correction, whether carried out a priori by adding static modes at the base of dynamic modes, or a posteriori. On a system specially calculated to show its effects, it shows that static correction can significantly reduce the error due to the modal truncation effect on « high frequencies » (static correction a posteriori), or even cancel it completely (static correction a priori), provided that the Ritz base thus obtained is re-orthogonalized. On an industrial study, we can expect a less visible effect.