This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Modeling process and validation of Hybrid FE-SEA method to structure-borne noise paths in a trimmed automotive vehicle
ISSN: 0148-7191, e-ISSN: 2688-3627
Published March 30, 2008 by SAE International in United States
Annotation ability available
The Finite Element Method (FEM) and the Statistical Energy Analysis (SEA) are standard methods in the automotive industry for the prediction of vibrational and acoustical response of vehicles. However, both methods are not capable of handling the so called “mid frequency problem”, where both short and long wavelength components are present in the same system. A Hybrid method has been recently proposed that rigorously couples SEA and FEM. In this work, the Hybrid FE-SEA method is used to predict interior noise levels in a trimmed full vehicle due to broadband structure-borne excitation from 200Hz to 1000Hz. The process includes the partitioning of the full vehicle into stiff components described with FE and modally dense components described with SEA. It is also demonstrated how detailed local FE models can be used to improve SEA descriptions of car panels and couplings. After review of the Hybrid FE-SEA models of a full vehicle that were built, sample experimental validation results of interior SPL and panel vibration are shown.
|Technical Paper||Hybrid Technique for Underbody Noise Transmission of Wind Noise|
|Technical Paper||Vibro-Acoustic CAE from an Industrial Application Perspective|
|Technical Paper||A Research About Converted Nearfield Acoustic Holography Method|
CitationCharpentier, A., Sreedhar, P., Cordioli, J., and Fukui, K., "Modeling process and validation of Hybrid FE-SEA method to structure-borne noise paths in a trimmed automotive vehicle," SAE Technical Paper 2008-36-0574, 2008, https://doi.org/10.4271/2008-36-0574.
- Kompella Murty S. and Bernhard Robert J., “Variation of structural-acoustic characteristics of automotive vehicles”, Noise Control Eng. J. 44(2), 1996 Mar-Apr.
- Shorter P.J., Langley R.S., “Vibro-acoustic analysis of complex systems,” Journal of Sound and Vibration, 288, 669-699 (2005).
- VA One 2007 Foam Module User's Guide, ESI Software, October 2007.
- Shorter P., Cotoni V., Langley R., “Numerical and Experimental Validation of the Hybrid FE-SEA method,” Proceedings of INTER-NOISE 05, Rio de Janeiro, Brazil (2005).
- Cotoni, V., Shorter, P.J., & Langley, R.S. (2007). “Numerical and experimental validation of a hybrid finite element-statistical energy analysis method,” J. Acou. Soc. Am. 122, 259-270.
- Cotoni V., Shorter P.J., Charpentier A., Gardner B., “Efficient models of the acoustic radiation and transmission properties of complex trimmed structures,” Proceedings of INTER-NOISE 05, Rio de Janeiro, Brazil (2005).
- Charpentier A., Cotoni V., and Fukui K., “Using the Hybrid FE-SEA method to predict structure-borne noise in a car body-in-white,” Proceedings of INTER-NOISE 06, Hawaii, USA, paper 85 (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,” Proceedings of SAE, Chicago, USA, paper 2181(2007).
- Charpentier A., Blanchet D., and Fukui K., “Full Vehicle SEA Model Uses Detailed Sound Package Definition To Predict Driver's Headspace Acoustic Response,” Proceedings of INTER-NOISE 04, Prague, Czech Republic, paper 472 (2004).
- Mace B., Shorter P.J., “Energy flow models from finite element analysis,” Journal of Sound and Vibration, 233, 369-389 (2000).
- Shorter P.J., de Boussier F.R., Frederick N., “Finite Element characterization of complex automotive panels for Statistical Energy Analysis (SEA),” Proceedings for Noise-Con 2005.
- Onsay T., Akanda A., Goetchius. G., “Vibro-Acoustic Behavior of Bead-Stiffened Flat Panels: FEA, SEA, and Experimental Analysis,” Proceedings of SAE, Traverse City, 1999.