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Mathematical Problems in Engineering
Volume 2010, Article ID 802720, 14 pages
Research Article

Vehicle Vibration Analysis in Changeable Speeds Solved by Pseudoexcitation Method

School of Mechanical Engineering and Automation, Northeastern University, Shenyang 110004, China

Received 31 December 2009; Revised 20 February 2010; Accepted 28 August 2010

Academic Editor: Carlo Cattani

Copyright © 2010 Li-Xin Guo and Li-Ping Zhang. 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.


The vehicle driving comfort has become one of the important factors of vehicle quality and receives increasing attention. In this paper, the mechanical and mathematical models of the half-car, five degrees of freedom (DOF) of a vehicle were established, as well as the pseudoexcitation model of road conditions for the front wheel and the rear wheel. By the pseudoexcitation method, the equations of transient response and power spectrum density were established. After numerical simulation to vehicle vibration response of changeable driving, the results show that the pseudoexcitation method is more convenient than the traditional method and effectively solves the smoothness computation problems of vehicles while the pseudoexcitation method is used to analyze vehicle vibration under nonstationary random vibration environments.