Vehicle Interior Low Frequency Noise Optimum Using Substructure Modal Synthesis Method

Abstract:

Combined with the structural dynamic model of a car set up with the substructure modal synthesis method, body panels acoustic contribution was analyzed to reduce the in-car structural noise in low frequency range. The driver-right-ear position was selected as acoustic response point, with the operational vibration response of the dynamic model as boundary condition for acoustic BEM (boundary element model), the panels that attribute most to the in-car noise were located according to ATV (acoustic transfer vector) results. After the vibrational restraint of the crucial panels by corresponding experimental measurement, in idling, the most decrease of main peaks is 5.7dB; the overall level of in-car noise is reduced by 3.89dB. It indicates that the substructure mode synthesis method can provide proper suggestion for optimizing in-car structural noise.

• Periodical: Advanced Materials Research (Volumes 396-398)
• Pages: 2206-2212
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.396-398.2206
• Online since: November 2011
• Authors: Er Bing Wang, Hong Zhou, Hai Qing Xu, Fang Zhang, Jing Wang
• Keywords: ATV, Low Frequency Noise, Panel Acoustic Contribution, Substructure Mode Synthesis

References

[1] PANG Jian, CHEN Gang, HE hua. Automotive Noise and Vibration[M]. Beijing：Beijing Institute of Technology Press, 2006：7-16.

[2] LI Hong-liang, DING Wei-ping, WANG Wu-lin. New Evolvements and Trends of Development about Noise Control Technology of Automobile[J]. Automobile Technology, 2007, (4)：1-4.

[3] S. M. Beane, M. M. Marchi, D. S. Snyder. Utilizing optimized panel damping treatments to improve powertrain induced NVH and sound quality[J]. Applied Acoustics, 1995, 45：181-187

DOI: 10.1016/0003-682x(94)00040-3

[4] P. Ragnarsson, T. Van Gaal, B. Pluymers, etal. Fast approximation of synthesized frequency response functions with automated multi-level substructuring (AMLS) [J]. Finite Elements in Analysis and Design, 2011, 47(2)：195-199.

DOI: 10.1016/j.finel.2010.08.009

[5] B. Biondi, G. Muscolino. Component-mode synthesis method for coupled continuous and FE discretized substructures[J]. Engineering Structures, 2003, 25(4)： 419-433.

DOI: 10.1016/s0141-0296(02)00183-9

[6] JIN Xiao-xiong, ZHANG Li-jun. Prediction and Control of Automotive Noise[M]. Shanghai：Tongji University Press, Shanghai, 2004：105-112.

[7] DING Ping, GU Yan. The application of substructure mode synthesis for vibration-acoustic analysis of automobile[J]. Shanghai Automobile, 2007(11). (in Chinese)

[8] YIN Xue-gang, CHEN Huai. The method of substructure for structural vibration analysis[M]. Beijing: China Railway Press, (1991)

[9] Magnus Alvelid. Optimal position and shape of applied damping material[J]. Journal of Sound and Vibration, 2008, 310(4-5)：947-965.

DOI: 10.1016/j.jsv.2007.08.024

[10] M.G. Sainsbury, Ravish S. Masti, Vibration damping of cylindrical shells using strain-energy-based distribution of an add-on viscoelastic treatment[J]. Finite Elements in Analysis and Design, 2007, 43(3)：175-192.

DOI: 10.1016/j.finel.2006.09.003

[11] Nigel D. Butler, S. Olutunde Oyadiji. Transmissibility characteristics of stiffened profiles for designed-in viscoelastic damping pockets in beams[J]. Computers and Structures, 2008, 86(3-5)：437-446.

DOI: 10.1016/j.compstruc.2007.02.003