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Date of Publication:2022-10-07

Journal:计算力学学报

Affiliation of Author(s):化工学院

Volume:26

Issue:1

Page Number:26-32

ISSN No.:1007-4708

Abstract:Non-stationary random vibration of vehicle-bridge coupling systems
   subjected to the action of irregular road surface is investigated in
   this paper. Pseudo-excitation method (PEM) is applied firstly to
   transform the random surface roughness into the superposition of a
   series of deterministic pseudo harmonic surface unevenness and thus
   simplifies the solution of the dynamic equations considerably. Three
   alternative formats of precise integration method (PIM) are presented to
   compute the vertical vibration responses due to the pseudo harmonic
   unevenness. They can well simulate the continuous varying of the road
   forces exerting on the vehicle both in the time and space domains, and
   thus have remarkably overcome the shortcomings of the conventional
   numerical integration methods, such as the Newmark method. Numerical
   results show that, the proposed combined PEM-PIM scheme is much more
   accurate and efficient than the widely used Newmark method for the
   random responses analysis of vehicle-bridge coupling systems.

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