The vibro-acoustics of a plate-backed cavity with non-homogeneous porous materials
Keywords:Boundary conditions, Computer simulation, Elasticity, Finite element method, Integral equations, Plates (structural components), Porous materials, Stiffness, Strain, Tensors, Vectors, Vibrations (mechanical), Air pockets, Nonhomogenous porous materials, Plate backed cavity, Vibroacoustics
AbstractThe effects of air pocket or elastic patches in a homogeneous porous domain were studied. The different domains were modeled by using accurate finite element methods. It was found that the addition of air pocket does not deteriorate the acoustic performance, but leads to a reduction of the weight of the configuration. On the other hand, an increase of the acoustic performance was obtained by insertion of elastic patches, but not without any increase of the configuration weight.
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