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Integrated Virtual Approach for the Optimization of Vehicle Sound Packages
Technical Paper
2009-26-0053
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Event:
SIAT 2009
Language:
English
Abstract
Generally all OEMs have a distinctive approach in designing their sound packages. Considering the complexity and combination involved in this process, there is no general valid scheme, although there tend to be some common blocks. Also as automotive manufacturers face strong demands to cut CO2 levels there is a trend to reduce prototypes and introduce limitations on weight of sound controlling materials. The supplier of the sound package must therefore be able to support the OEMs in taking design decisions early, quickly and based just on drawings, or even just on sketches in the concept phase.
A proposed way forward in designing fast and cost-effective sound packages is by skillfully combining target setting, material characterization measurements, virtual prototyping and optimization tools.
The solution should not only be acoustically effective, but also lightweight and cheap. Material characterization is dictated by design methodologies that allow accurate and efficient physical representation of not only damping material, in terms of their mechanical properties, but as well of porous materials in terms of their acoustic absorption and transmission properties. At material and component level, for medium and high frequencies, a transfer matrix approach using Biot's equations can be used to calculate the above-mentioned performances for multi-layered trim parts. At a vehicle level it well assessed the usage of Finite Elements (FE) to analyze the structure borne noise performance at low frequency; this practice can be enriched by the implementation of damping and porous models to reproduce trimmed bodies. On the other hand SEA is used for air borne noise analysis at medium and high frequencies to support in the target cascading and achievement process. It is shown here how the material characterization, modeling and simulation can be united with optimization procedures (e.g.: Genetic Algorithms) to define the optimal combination of vehicle panel shape, damping material distribution, and layout of sound absorbing multi layered trim parts.
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Authors
Citation
Ravinath, V., Mantovani, M., Bertolini, C., and Caprioli, D., "Integrated Virtual Approach for the Optimization of Vehicle Sound Packages," SAE Technical Paper 2009-26-0053, 2009, https://doi.org/10.4271/2009-26-0053.Also In
References
- Lauriks, W. Mees, P Allard, J. F. “The Acoustic Transmission through Layered Systems” Journal of Sound and Vibration 155 1 125 132 1992
- Allard, J. F. Champoux, Y Depollier, C. “Modelization of Layered Sound Absorbing Materials with Transfer Matrices” Journal of the Acoustical Society of America 79 6 1734 1740 1986
- Bolton, J. S. Shiau, N. M Kang, Y. “Sound Transmission Through Multi-Panel Structures Lined With Elastic Porous Materials” Journal of Sound and Vibration 191 3 317 347 1996
- Song, B. H Bolton, J. S. “A Transfer-Matrix Approach for Extimating the Characteristic Impedance and Wave Numbers of Limp and Rigid Porous Materials” Journal of the Acoustical Society of America 107 3 1131 1152 2000
- Brouard, B., et al. “A General Method of Modelling Sound Propagation in Layered Media” Journal of Sound and Vibration 183 1 1995
- Faverjon, B Soize, C “Equivalent Acoustic Impedance Model. Part 1: Experiments and Semi-Physical Model” Journal of Sound and Vibration 276 571 592
- Faverjon, B Soize C. “Equivalent Acoustic Impedance Model. Part 2: Analytical Approximation” Journal of Sound and Vibration 276 593 613
- Coyette, J. P Bluemhof, H, “A Generalized Procedure for Modeling Multi-Layer Insulation Systems” Proceedings of ISMA10 Leuven 1996
- Kang, Y. J Bolton, J. S. “Finite Element Modeling of Isotropic Elastic Porous Materials Coupled with Acoustical Finite Elements” Journal of the Acoustical Society of America 98 1 635 643 1995
- Kang, Y. J Bolton, J. S. “A Finite Element Model for Sound Transmission Through Foam-Lined Double Panel Structures” Journal of the Acoustical Society of America 99 5 2755 2765 1996
- Panneton, R. Atalla, N Allard, J. F. “A 3-D Finite Element Model for Sound Transmission Through A Double-Plate System with Isotropic Elastic Porous Materials” Journal of the Acoustical Society of America 96 3339 1994
- Panneton, R Atalla, N. “Numerical Prediction of Sound Transmission Through Finite Multilayer Systems with Poroelastic Materials” Journal of the Acoustical Society of America 100 1 346 354 1996
- Panneton, R. Atalla, N. “An Efficient Finite Element Scheme for Solving The Three-Dimensional Poroelasticity Problem in Acoustics” Journal of the Acoustical Society of America 101 6 3287 3298 1997
- Dauchez, N Sahraoui, S “Convergence Of Poroelastic Finite Elements Based on Biot Displacement Formulation” Journal of the Acoustical Society of America 109 1 2001
- Gorog, S. Panneton, R Atalla, N. “Mixed Displacement-Pressure Forumlation for Acoustic Anisotropic Open Porous Media” Journal of Applied Physics 82 4192 4196 1997
- Atalla, N. Panneton, R Debergue, P. “A Mixed Displacement-Pressure Formulation for Poroelastic Materials” Journal of the Acoustical Society of America 104 3 1998
- Debergue P. et al. “Boundary Conditions for the Weak Formulation Of The Mixed (U,P) Poroelasticity Problem” Journal of the Acoustical Society of America 106 5 1999
- Atalla N. et al. “Enhanced Weak Integral Formulation for the Mixed (U,P) Poroelastic Equations” Journal of the Acoustical Society of America 109 6 2001
- Rigobert, S. Sgard, F Atalla, N. “Investigation Of The Convergence of the Mixed Displacement-Pressure Formulation for Three-Dimensional Poroelastic Materials Using Hierarchical Elements” Journal of the Acoustical Society of America 114 5 2607 2617 2003
- Rigobert, S. Sgard, F Atalla, N. “A Two-Field Hybrid Formulation for Multilayers Involving Poroelastic, Acoustic and Elastic Materials” Journal of the Acoustical Society of America 115 6 2786 2797 2004
- Göransson, P. “A 3-D Symmetric Finite Element Formulation of the Biot Equations with Application to Acoustic Wave Propagation Through An Elastic Porous Medium” International Journal of Numerical Methods in Engineering 41 167 192 1999
- Hörlin, N. E. Nordström, M Göransson, P. “A 3-D Hierarchical FE Formulation of Biot's Equations for Elasto-Acoustic Modeling of Porous Media” Journal of Sound and Vibration 245 4 633 652 2001
- Hörlin, N. E. “3D Hierarchical Hp-FEM Applied to Elasto-Acoustic Modelling of Layered Porous Media” Journal of Sound and Vibration 285 341 363 2005
- Hamdi, M. A., et al. “Novel Mixed Finite Element Formulation for the Analysis of Sound Absorption by Porous Materials” Proceedings of Internoise 2000 Nice 2000
- Hamdi, M. A., et al. “An Efficient Finite Element Formulation for the Analysis of Acoustic and Elastic Waves Propagation in Sound Packages” Proceedings of the SAE Conference 2001 Traverse City 2001
- Biot, A. “Theory of Propagation of Elastic Waves in A Fluid-Saturated Porous Solid - Low Frequency Range” Journal of the Acoustical Society of America 28 2 1956
- Biot, M. A. “Theory of Propagation of Elastic Waves in a Fluid-Saturated Porous Solid - High Frequency Range” Journal of the Acoustical Society of America 28 2 1956
- Allard, J. F. “Propagation of Sound in Porous Media” Elsevier Applied Science 1993
- Courtois. T. Bertolini, C Lütof, J. “Hybrid Measurement System to Build Porous Material Models: An Acoustical Inverse Method to Determine Intrinsic Parameters of Porous Samples” Proceedings of the Rieter Automotive Conference 2005
- Tschudi, H. R. “Transfer Matrix Theory of Damping Of Multilayer Structures” Proceedings of the Rieter Automotive Conference 1993
- Semeniuk, B. “The Simulation of the Acoustic Absorption and Transmission Characteristics of Automotive Material Configurations: the New SISAB Software” Proceedings of the Rieter Automotive Conference 1999
- Bertolo, P Courtois, T “VISUAL SISAB: A Graphical Tool for A Quick and Accurate Assessment of the Acoustic Properties of Car Parts” Proceedings of the Rieter Automotive Conference 2007
- Avenati Bassi, F. Lorea, S Bertolini, C. “Treasuri/FE: A New Tool for the FE Simulation of Poroelastic Materials Fully Integrated in MSC/ Nastran” Proceedings of the Rieter Automotive Conference 2007
- Strasser, P. Ferrali, L Caprioli, D. “An Integrated Tool for the FEM Representation and Optimisation of Damping Treatments on Vehicle Bodies” Proceedings of the SIA Conference 2002
- Ahlquist, J. R et al. “Optimal Sound Package Design Using Statistical Energy Analysis and the Rieter Automotive SEA Template” Proceedings of the Rieter Automotive Conference 2003
- Ahlquist, J. R. “REVAMP: A Full-Vehicle Acoustic Modelling Software To Support Rfqs And Early Vehicle Development” Proceedings of the Rieter Automotive Conference 2005
- Bertolini, C Gigante, L. “An Sea-Based Procedure for the Definition of Sound Package Component Targets Starting from Global Vehicle Targets” Proceedings of Vibro-Acoustics Users Conference 2003