3rd French conference on acoustics
J. Phys. IV France 04 (1994) C5-1009-C5-1012
Effets d'un fluide en écoulement uniforme sur le comportement vibro-acoustique d'une plaque bafflée couplée à une cavité rectangulaireF. SGARD, N. ATALLA and J. NICOLAS
GAUS, Département de Génie Mécanique, Université de Sherbrooke, Sherbrooke, Québec J1K 2R1, Canada
The purpose of this work is to develop a general formulation to deal with the vibro-acoustic behavior of a baffled plate, immersed on one side in a mean flow and coupled on the other side to a rectangular cavity with arbitrary wall impedances. The plate is excited by a plane wave convected by the mean flow. The formulation is based on a finite element method for the calculation of the transverse vibrations of the plate and the acoustic field inside the cavity. The external fluid loading is accounted for through the extended Kirchoff-Helmoltz integral equation and the radiation impedance of the plate in the external fluid is computed with a boundary element method. The mean flow effects on the transmission loss of the plate are discussed.
© EDP Sciences 1994