On the dynamic behavior of bladed disks using wave finite element strategies and model reduction techniques
Résumé
In this paper the wave finite element method is applied to compute the harmonic response of bladed disks with distributed loads, e.g., for substructures (sectors) subjected to an engine order excitation. The proposed approach consists in (i) expressing the displacements and forces at the interfaces between the substructures in terms of wave modes, (ii) expressing the external forces in terms of wave modes and (iii) solving a local/substructure equation for expressing wave amplitudes. To improve the efficiency of the WFE method, a model reduction technique is proposed where the key idea is to express the displacement vectors at the substructure interfaces with a small number of boundary modes. Numerical simulations are carried out on a 3D industrial structure where the efficiency and accuracy of the WFE approach are demonstrated.
Domaines
Sciences de l'ingénieur [physics]Origine | Fichiers produits par l'(les) auteur(s) |
---|