Summary of results ====================== The results show the good modal behavior of the elements of the 3D_ FAISCEAU modeling in flexure, in the absence of the fluid. They also show a very good agreement of the frequencies of the ensemble modes with the heterogeneous *Aster* calculation, when there is fluid. For the frequencies of the set modes, there are no differences between a HEXA8 and HEXA20 mesh (this is not true for the other modes). The numerical results of the masses and inertias obtained by *Code-Aster* are very close to the analytical results (error :math:`\text{}<{6.10}^{-6}`).