Rayonnement acoustique de structures non bafflées

Abstract
If the simulation of the radiated field of a baffled plane structure has been deeply studied, the unbaffled case, although more realistic, has retained little attention. The proposed works tend to simulate, by an analytical approach, the radiation of a plane unbaffled structure of finite dimensions and general elastic type of boundary conditions. This approach is based on an integral method coupled with a Ritz approach for the calculus of the displacement field of the structure. The power is evaluated through the pressure jump across the plate. Translation and rotational springs create varying boundary conditions. A good comparison is found with a numerical approach (B.E.M.). Parametric studies showed the effect of the baffle. Precise measurements confirm the validity of the simulations.