Sensitivity analysis and optimization of vehicle-bridge systems based on combined PEM-PIM strategy

Xu, W. T., Zhang, Y. H., Lin, J. H., Kennedy, David ORCID: https://orcid.org/0000-0002-8837-7296 and Williams, Frederic Ward 2011. Sensitivity analysis and optimization of vehicle-bridge systems based on combined PEM-PIM strategy. Computers and Structures 89 (3-4) , pp. 339-345. 10.1016/j.compstruc.2010.11.011

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Abstract

This paper presents a new optimization method for coupled vehicle–bridge systems subjected to uneven road surface excitation. The vehicle system is simplified as a multiple rigid-body model and the single-span bridge is modeled as a simply supported Bernoulli–Euler beam. The pseudo-excitation method transforms the random surface roughness into the superposition of a series of deterministic pseudo-harmonic excitations, which enables convenient and accurate computation of first and second order sensitivity information. The precise integration method is used to compute the vertical random vibrations for both the vehicle and the bridge. The sensitivities are used to find the optimal solution, with vehicle ride comfort taken as the objective function. Optimization efficiency and computational accuracy are demonstrated numerically.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Engineering
Subjects:	T Technology > TG Bridge engineering T Technology > TL Motor vehicles. Aeronautics. Astronautics
Uncontrolled Keywords:	Coupled vehicle–bridge systems; Pseudo-excitation method; Precise integration method; Sensitivity analysis
Publisher:	Elsevier
ISSN:	0045-7949
Last Modified:	06 Jan 2024 03:48
URI:	https://orca.cardiff.ac.uk/id/eprint/14036

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