VIOLINS - A Modeling Tool for Layered Materials

Paper #:
  • 980947

Published:
  • 1998-02-23
Citation:
Coyette, J. and Coats, T., "VIOLINS - A Modeling Tool for Layered Materials," SAE Technical Paper 980947, 1998, https://doi.org/10.4271/980947.
Pages:
7
Abstract:
Layered structures made from elastic and porous materials are widely used as insulation systems in the automotive industry. They have a dynamic behavior which is strongly influenced by the various interaction mechanisms within the porous material. The paper concentrates on modeling such materials using a 3-D finite element (FE) approach. This model can be combined with a boundary element (BE) procedure in order to assess the radiated acoustic field. The key part of FE representation is a Biot's model for the two phase porous material. A mixed displacement formulation is selected. The model can be used for predicting the surface impedance and/or the acoustic transmission characteristics of layered materials. The combined use of this mixed FE/BE model enables also the evaluation of the acoustic response (radiated power, field pressure).
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