This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Optimization of Acoustical Behavior of Sound Absorptions Based on Finite Element Modeling
Technical Paper
2005-01-3580
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
In this paper finite element model of porous materials is used to improve the acoustical behavior of vehicle sound absorbers. The equation of wave propagation in the porous materials with rigid frame is presented after explaining the physical properties of these materials. The finite element formulation of governing equation and boundary conditions is obtained based on Galerkin method. Simulation results are compared with the corresponding results of the other validated papers and also verified by analytical results. Finally, effects of physical and geometrical parameters on the acoustical behavior of absorbers are studied. In addition, the influence of an air gap on the back of the material and also multilayer absorbers are investigated. It is shown that the acoustical behavior of these materials, particularly in the low frequency range, can be improved.
Recommended Content
Authors
Citation
Ohadi, A. and Moghaddami, M., "Optimization of Acoustical Behavior of Sound Absorptions Based on Finite Element Modeling," SAE Technical Paper 2005-01-3580, 2005, https://doi.org/10.4271/2005-01-3580.Also In
References
- Allard J. F. Propagation of Sound in Porous Media (Modeling Sound Absorbing Materials) Elsevier Applied Science 1993
- Bolton J. S. Kang Y. J. “Elastic Porous Materials for Sound Absorption and Transmission Control” SAE 971878 2576 2590 1997
- Cimerman B. Bremner P. Qian Y. Van Buskirk J. A. “Incorporating Layered Acoustic Trim Materials in Body Structural-Acoustic Models” SAE 951307 2289 2294 1995
- Seybert A. F. Seman R. A. Lattuca M. D. “Boundary Element Prediction of Sound Propagation in Ducts Containing Bulk Absorbing Materials” ASME Journal of Vibration and Acoustics 120 976 981 1998
- Sgard F.C. Atalla N. Nicolas J. “A Numerical Model for the Low Frequency Diffuse Field Sound Transmission Loss of Double-Wall Sound Barriers with Elastic Porous Linings” J. of Acoustical Society of America 108 6 2865 2872 2000
- Castel F. Sgrad F. Atalla N. “Quadratic Finite Element Model for Predicting the Vibro-Acoustic Behavior of Heterogeneous Porous Materials” Proceedings of ISMA V 2207 2214 2002
- Dazel O. Sgard F. Lamarque C. H. Atalla N. “An Extension of Complex Modes for the Resolution of Finite-Element poroelastic Problems” J. of Sound and Vibration 253 2 421 445 2002
- Atalla N. Panneton R. “Acoustic Absorption of Macro-Perforated Porous Materials” J. of Sound and Vibration 243 4 659 678 2001
- Fellah Z. E. A. Berger S. Lauriks W. Depollier C. Aristegui C. Chapelon J. Y. “Measuring the Porosity and the Tortuosity of Porous Materials via Reflected Waves at Oblique Incidence” Journal of the Acoustical Society of America 113 5 2424 2433 2003