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Shock and Vibration
Volume 2017 (2017), Article ID 8725346, 17 pages
https://doi.org/10.1155/2017/8725346
Research Article

Full Vehicle Vibration and Noise Analysis Based on Substructure Power Flow

1Hubei Key Laboratory of Advanced Technology for Automotive Components, Wuhan University of Technology, Wuhan 430070, China
2Hubei Collaborative Innovation Center for Automotive Components Technology, Wuhan 430070, China
3Automotive Engineering Institute, Guangzhou Automobile Group Co., Ltd., Guangzhou 511434, China

Correspondence should be addressed to Shuai Yuan

Received 30 November 2016; Revised 6 March 2017; Accepted 20 March 2017; Published 30 April 2017

Academic Editor: Mario Terzo

Copyright © 2017 Zhien Liu et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Combining substructure and power flow theory, in this paper an external program is written to control MSC. Nastran solution process and the substructure frequency response are also formulated accordingly. Based on a simple vehicle model, characteristics of vibration, noise, and power flow are studied, respectively. After being compared with the result of conventional FEM (finite element method), the new method is confirmed to be feasible. When it comes to a vehicle with the problem of low-frequency noise, finite element models of substructures for vehicle body and chassis are established, respectively. In addition, substructure power flow method is also employed to examine the transfer characteristics of multidimensional vibration energy for the whole vehicle system. By virtue of the adjustment stiffness of drive shaft support and bushes at rear suspension lower arm, the vehicle interior noise is decreased by about 3 dB when the engine speed is near 1050 rpm and 1650 rpm in experiment. At the same time, this method can increase the computation efficiency by 78%, 38%, and 98% when it comes to the optimization of chassis structure, body structure, and vibration isolation components, respectively.