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International Journal of Automotive Technology > Volume 3(3); 2002 > Article
International Journal of Automotive Technology 2002;3(3): 101-109.
A STUDY ON NONSTATIONARY RANDOM VIBRATION OF A VEHICLE IN TIME AND FREQUENCY DOMAINS
C.-M. LEE1, L. -J. ZHANG2, Y. S. WANG1
1University of Ulsan
2Liaoning Institute of Technology
ABSTRACT
A time domain method for solving nonstationary random vibration caused by vehicle acceleration is first proposed in which a time changing model is established for representing nonstationary excitation of a rough road. Furthermore a novel frequency domain method called the transient power spectral density with spatial frequency (TPSD) is presented to obtain a response of vehicle system in frequency domain. This method has been proved to be valid y comparing numerical results with the exact solution.
Key Words: Nonstationary excitation model of rough road, Vehicle acceleration, Transient power spectral density with spatial frequency
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