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VIOLINS - A Modeling Tool for Layered Materials
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English
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).
Citation
Coyette, J. and Coats, T., "VIOLINS - A Modeling Tool for Layered Materials," SAE Technical Paper 980947, 1998, https://doi.org/10.4271/980947.Also In
References
- Delany, M.E. Bazley, E.N. Acoustical properties of fibrous materials Appl. Acoust. 1970 3 105 116
- Biot, M.A. Theory of elasticity and consolidation for a porous anisotropic solid J. Appl. Phys. 1955 26 182 185
- Biot, M.A. Theory of propagation of elastic waves in a fluidsaturated porous solid JASA 1956 28 168 191
- Biot, M.A. Mechanics of deformation and acoustic propagation in porous media J. Appl. Phys. 1962 33 1482 1498
- Allard, J.F. Propagation of sound in porous materials - Modelling sound absorbing materials Elsevier Applied Science London and New-York 1993
- Simon, R. Wu, J.S.S. Zienkiewicz, O.C. Paul, D.K. Evaluation of u-w and u-p finite element methods for the dynamic response of saturated porous media using onedimensional models International Journal for Numerical and Analytical Methods in Geomechanics 1986 10 461 482
- User's Manual LMS Numerical Technologies Leuven 1996
- Coyette, J.P. A refined boundary element technique for modeling acoustic radiation from complex structural models Sas P. 995 1010 Proceedings of the 17th International Seminar on Modal Analysis and Structural Dynamics KU Leuven 1992
- Coyette, J.P. Sas, P. Numerical solution methods for vibro-acoustic radiation problems Course on Advanced Techniques in Applied Acoustics KU Leuven 25 Sas P. 1992
- User's Manual LMS Numerical Technologies 1996
- Olson, L.G. Bathe, K.J. A study of displacement-based fluid finite elements for calculating frequencies of fluidstructure systems Nuclear Engineering and Design 1983 76 137 151