Acoustic vibration model of a composite shell with sound absorption material
Acoustic vibration model of a composite shell with sound absorption material
- New search for: Dungan, M.R.
- New search for: Mollo, C.
- New search for: Vlahopoulos, N.
- New search for: Anderson, W.J.
- New search for: Dungan, M.R.
- New search for: Mollo, C.
- New search for: Vlahopoulos, N.
- New search for: Anderson, W.J.
Reduction of sound transmitted through vehicle panels is increasingly important. A foam layer on vehicle panels is often used to passively control sound and small amplitude vibrations. Currently, this sound absorption layer can be modeled and analyzed using the finite element method only in two dimensions. This formulation assumes an isotropic structural member that couples with the elastic porous material. To expand beyond isotropic structures, fibrous composite plate and shallow shell elements are presented. These were developed from the Mindlin plate assumptions extended to shear deformable and shallow shell composite laminates. The governing equations for the elastic porous material are extended to three dimensions, and a procedure is described to convert these equations into a solid finite element formulation. The two-dimensional foam-structure coupling leads to a determination of the coupling in the more general case. The development of this finite element formulation for elastic porous materials allows for designing low weight sound absorption systems with maximum transmission loss.
Document information
Acoustic vibration model of a composite shell with sound absorption material
Akustisches Schwingungsmodell einer Verbundschale mit Schallabsorptionsstoff
1996
7 Seiten, 3 Bilder, 15 Quellen
Conference paper
English
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