Automotive Interior Noise Analysis and Optimization Subjected to Different Road Excitations

Abstract:

The automotive interior noise subjected to different road excitations was analyzed with finite element simulation method, according to the analysis results of panel acoustic contribution; acoustic property of the vehicle was optimized. Firstly, B and C grade road spectra were generated by MATLAB. Secondly, the frequency response results of body structure subjected to different road excitations were computed by MSC.NASTRAN, and the response results were imported in LMS Virtual. Lab as velocity boundary condition via the coupling between the body structure and cab cavity, and the sound pressure level (SPL) around driver’s ears was predicted by using Acoustic Transfer Vector (ATV) technology. Also, the impact of cavity structure surface impedance on the interior noise was discussed, and the noise characteristics subjected to different road spectra were compared. And the contributions of body panels to the noise levels around the driver’s ears were achieved via panel acoustic contribution analysis (PACA). Finally, taking the vibration velocity of panels as the main goal, the body structure was optimized to reduce the automotive interior noise.

• Periodical: Advanced Materials Research (Volumes 199-200)
• Pages: 1014-1019
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.199-200.1014
• Online since: February 2011
• Authors: Hao Long Niu, Qing Chun Wang, Yu Xin Wang, Jian Rong Fu
• Keywords: Acoustic Transfer Vector, Interior Noise, Panel Thickness Optimization, Road Excitation

References

[1] Dengfeng Wang, Junming Li, Xiaojun Lu: Automotive Engineering. Vol. 22(2000), p.93~96. (In Chinese).

[2] Xinhua Liang, Ping Zhu, Zhongruan Lin, et al: J. Shanghai Jiaotong University. Vol. 40(2006). p.177~180. (In Chinese).

[3] Changming Chen, Wei Sun: J. Vibration and Shock. Vol. 27(2008), p.102~105. (In Chinese).

[4] Guosheng Zhang, Zongde Fang, Shanzhi Chen, et al: Automotive Engineering. Vol. 30(2008), p.44~47. (In Chinese).

[5] Runhua Tan, Ying Chen, Dongfang Yao, et al: J. Vibration, Measurement & Diagnosis. Vol. 20(2000): 119-122. (In Chinese).

[6] Xiaolei Li, Baokun Han: J. Beijing Institute of Technology. Vol. 23(2003), p.717~719. (In Chinese).

[7] Eddie Wadbro, Martin Berggren: Computer Methods in Applied Mechanics and Engineering. Vol. 196(2006), p.420~436.

[8] H. Denli, J.Q. Sun: J. Sound and Vibration, Vol. 301(2007), p.93~105.

[9] Xiaoxiong Jin, Lijun Zhang. Prediction and control of automotive noise (Tongji University publications China 2004).

[10] Jun Zhang, Wenzhong Zhao, Suming Xie, et al: J. Vibration Engineering. Vol. 18(2005), p.519~523. (In Chinese).

[11] C.R. Fredö, Anders Hedlund: 2004 SAE International, 2005-01-2342.

[12] GB/T 7031-2005: Mechanical vibration-Road surface profiles-Reporting of measured data. (In Chinese).

[13] Xiandong Liu, Zhidang Deng, Feng Gao: J. Beijing University of Aeronautics and Astronautics. Vol. 29(2003), p.843~846. (In Chinese).

[14] Zhisheng Yu: Automotive theory (Machinery Industry publications China 2000).

[15] Jiangbin Zhou: The application of CAE method in solving the car low frequency noise of fuel-cell cars(Master thesis, Tongji University China 2007).

[16] GB/T 18697-2002: Acoustic-Measurement of noise inside motor vehicles. (In Chinese).