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Hybrid FEA-SEA Modeling Approach for Vehicle Transfer Function
ISSN: 0148-7191, e-ISSN: 2688-3627
Published June 15, 2015 by SAE International in United States
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Finite element analysis (FEA) is commonly used in the automotive industry to predict low frequency NVH behavior (<150 Hz) of structures. Also, statistical energy analysis (SEA) framework is used to predict high frequency (>400 Hz) noise transmission from the source space to the receiver space. A comprehensive approach addressing the entire spectrum (>20 Hz) by taking into account structure-borne and air-borne paths is not commonplace.
In the works leading up to this paper a hybrid methodology was employed to predict structure-borne and air-borne transfer functions up to 1000 Hz by combining FEA and SEA. The dash panel was represented by FE structural subsystems and the noise control treatments (NCTs) and the pass-throughs were characterized via testing to limit uncertainty in modeling. The rest of the structure and the fluid spaces were characterized as SEA subsystems. The simulation and validation tests were performed on a single source input representing the air induction system (AIS).
Sound transmission loss (STL) and vibration transfer mobility (v/F) metrics were used for correlating the model against the test data. The model was able to predict accurately the transfer functions for various measurement conditions. Future work is planned to analyze coupling loss factors across critical hybrid-junctions and expand the analysis to multiple source inputs.
CitationTathavadekar, P., de Alba Alvarez, R., Sanderson, M., and Hadjit, R., "Hybrid FEA-SEA Modeling Approach for Vehicle Transfer Function," SAE Technical Paper 2015-01-2236, 2015, https://doi.org/10.4271/2015-01-2236.
- Shorter P.J. and Langley R.S. Vibro-acoustic analysis of complex systems Journal of Sound and Vibration 2004
- Langley R.S. and Bremner P. Journal of the Acoustical Society of America A hybrid method for the vibration analysis of complex structural-acoustic systems 105 1657 1671 1999
- Shorter P.J. and Langley R.S. Journal of the Acoustical Society of America On the reciprocity relationship between direct field radiation and diffuse reverberant loading 117 85 95 2005
- Beranek L. L. Noise and Vibration Control Engineering Principles and Applications Beranek Leo L. and Ver Istvan L. Wiley New York 1992
- Cremer , L. , Heckl , M. and Petersson Structure-borne sound: structural vibrations and sound radiation at audio frequencies 3rd Springer Berlin, DA
- Charpentier , K. Fukui Using the Hybrid FE-SEA method to predict structure-borne noise in a car body in white Proc. Internoise 2006
- Charpentier , A. , Sreedhar , P. , and Fukui , K. Using the Hybrid FE-SEA Method to Predict Structure-borne Noise Transmission in a Trimmed Automotive Vehicle SAE Technical Paper 2007-01-2181 2007 10.4271/2007-01-2181
- Shorter , P. , Zhang , Q. , and Parrett , A. Using the Hybrid FE-SEA Method to Predict and Diagnose Component Transmission Loss SAE Technical Paper 2007-01-2172 2007 10.4271/2007-01-2172