Application Research of Statistical Energy Analysis on Vehicle Sound Package
A whole vehicle SEA model is established by hybrid method combining body structure and sound package. Modal density, damping loss factor and sound package material parameters are obtained by testing and then applied into the vehicle model. The vehicle acoustic performances are tested at both ideal running condition and operating condition, and the tested results at ideal running condition are used to correct the SEA model. The outer cavity sound pressure tested in vehicle at operating condition is used as the excitation for prediction of the interior noise. The difference between the predicted interior noise and the tested results is less than 3 dB(A), which shows good correlation. Two optimized methods are proposed to reduce a vehicle interior noise by 1 ~ 3 dB(A) without the changes of weight.
KeywordsStatistical energy analysis Sound package Noise Modal density Damping loss factor
The authors would like to thank the following individuals for their assistance and support: Dr. Pang Jian, Frank WU, and other colleagues all from Changan Auto Global R&D Center.
- 1.Pang J, Chen G, He H (2006) Automotive noise and vibration-principle and application. Beijing Institue of Technology Press, BeijingGoogle Scholar
- 2.Liu T, Gu Y (2006) SEA application in vehicle interior noise analysis. Noise Vibr Control 4:66–69Google Scholar
- 3.Wang D, Chen S (2009) Car interior noise prediction and experimentation using statistical energy analysis. J Jilin Univ 39(3):68–73Google Scholar
- 4.Liu WL, Tao D, Kathawate G (1999) Use of statistical energy analysis method to predict sound transmission loss of sound barrier assemblies. SAE: 1999-01-1707Google Scholar
- 5.Moore JA, Powell R, Bharj T (1999) Development of condensed SEA models of passenger vehicles. SAE: 1999-01-1699Google Scholar
- 6.Blanchet D, Cunningham A (2003) Building 3D SEA models from templates-new developments. SAE: 2003-01-1541Google Scholar
- 7.Galasso A, Montuori G, Rosa S D, Franco F (2003) Vibroacoustic analyses of car components by experimental and numerical tools. SAE: 2003-01-14Google Scholar
- 8.Huang LY, Krishnan R, Connelly T, Knittel JD (2003) Development of a luxury vehicle acoustic package using SEA full vehicle model. SAE: 2003-01-1554Google Scholar
- 9.Zhenpo W, Hongwen H (2001) Study on prediction of vehicle vibration and noise by using SEA method. Automobile Sci Technol 6:10–34Google Scholar
- 10.Ning F, Zhang J (2002) Hilbert transform in loss factor measurement. J Shandong Inst Technol 16(1):17–20Google Scholar