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Indexed by:期刊论文

Date of Publication:2016-11-10

Journal:JOURNAL OF SOUND AND VIBRATION

Included Journals:SCIE、EI、Scopus

Volume:382

Page Number:179-192

ISSN No.:0022-460X

Key Words:Moving random load; Pseudo-excitation method; Fourier transform; Wavelet method

Abstract:To study the stochastic response of a beam-soil structure under a moving random load, a hybrid approach based on the pseudo-excitation method and the wavelet method is proposed. Using the pseudo-excitation method, the non-stationary random vibration analysis is transformed into a conventional moving harmonic load problem. Analytical solutions of the power spectral density and standard deviation of vertical displacement are derived in an integral form. However, the integrand is singular and highly oscillatory, and the computational time is an important consideration because a large number of frequency points must be computed. To calculate the response accurately and efficiently, a wavelet approach is introduced. Numerical results show that the frequency band which brings the most significant response is dependent on the load velocity. The hybrid method provides a useful tool to estimate the ground vibration caused by traffic loads. (C) 2016 Elsevier Ltd. All rights reserved.