Estimation of SEA coupling loss factors using a dual formulation and FEM modal information, part II: numerical applications

Laurent Maxit (1, 2) , Jean-Louis Guyader (1, 2)

1 LVA - Laboratoire Vibrations Acoustique
2 CeLyA - centre Lyonnais d'Acoustique

Numerical applications of the approach presented in the first of these two companion papers is proposed in the cases of coupled beams and coupled plates. Results are compared with other calculations. CLF calculation for coupled beams is achieved with analytical modal description. The influence of thickness ratio and damping about the quality of the prediction are presented and discussed. CLF determination with FEM modal description are then applied to the case of two thin plates coupled in an L shape. This case permit to achieve comparison with other calculation and will be representative of the applicability of the method to more complex structures as industrial ones. A very good agreement is noticed that validate the calculation of CLF with the present method.

Domaines: Acoustique [physics.class-ph]; Acoustique [physics.class-ph]

Laurent Maxit, Jean-Louis Guyader. Estimation of SEA coupling loss factors using a dual formulation and FEM modal information, part II: numerical applications. Journal of Sound and Vibration, 2001, 239 (5), pp.931-948. ⟨10.1006/jsvi.2000.3193⟩. ⟨hal-01162187v2⟩