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Validation of reduced order modeling for the prediction of the response and fatigue life of panels subjected to thermo-acoustic effects

Domenii publicaţii > Stiinte ingineresti + Tipuri publicaţii > Articol în revistã ştiinţificã

Autori: Marc P. Mignolet, Adrian G. Radu, Xiaowei Gao

Editorial: JANTEC, William Street, Southampton, UK, ISBN 0 854 32 7894, Eighth International Conference on Recent Advances in Structural Dynamics, Southampton, UK - 14, 15 and 16 July 2003, 2003.

Rezumat:

This paper focuses on the validation of a reduced order modeling strategy for aircraft panels subjected to combined thermal effects and an incident acoustic wave strong enough to induce a severe geometrically nonlinear behavior. The response of flat panels to two different excitations scenarios serves as a basis to assess the appropriateness of several modal bases for the reduced order modeling. This comparison emphasizes the importance of the in-plane displacement field and of a reliable modeling of the curvature of the deformed panels. Consistently with these observations, a novel basis is introduced that involves separate representations of the transverse displacements and their induced in-plane counterparts.

Cuvinte cheie: Dynamic response, Fatigeu, Panels, Finite Element