Interval response analysis of a bridge under a moving vehicle with bounded system parameters based on particle swarm optimization algorithm

Publication Type:
Conference Proceeding
ECCOMAS 2012 - European Congress on Computational Methods in Applied Sciences and Engineering, e-Book Full Papers, 2012, pp. 8021 - 8035
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Interval dynamic response analysis of vehicle-bridge interaction system with uncertain parameters is studied in this paper. The bridge's and vehicle's parameters are considered as interval variables. A half car model is used to represent a moving vehicle and the bridge is assumed as a simply supported Euler-Bernoulli beam. Using the interval algorithm, the expressions of the midpoint value, interval width, lower and upper bounds of interval bridge dynamic response are developed. The lower and upper bounds are respectively the minimum and maximum values of bridge dynamic response, which can be determined by optimization approaches. A heuristic optimization method, particle swarm optimization (PSO), is then employed to find the bounds of bridge displacement. An example is used to illustrate the effectiveness of the presented methods and the computed results are compared with Monte-Carlo simulations. The effects of individual system parameters on bridge response are also investigated.
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