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论文类型：期刊论文

发表时间：2015-07-01

发表刊物：COMPUTERS & STRUCTURES

收录刊物：SCIE、EI、Scopus

卷号：154

页面范围：135-144

ISSN号：0045-7949

关键字：Vehicle-bridge system; Vibration; Separation; Linear complementarity problem; Random roughness

摘要：In the present paper, a linear complementarity method for a vehicle-bridge dynamic system considering separation and random roughness is established. By introducing the linear complementarity relationship between the relative displacement of the wheels and the bridge at the contact points, the dynamic interaction problem of the vehicle-bridge coupled system is transformed into a standard linear complementarity problem, and two models with different connection relations between the wheels and the bridge are proposed; The presented models characterize the system with one unified formulation whether the wheels separate from the bridge or not, and the conventional trial-and-error iterative process in numerical simulation is avoided. In the numerical examples, the proposed method is verified by comparing it with the conventional method, and it is found that the velocity, the vehicle to bridge mass ratio and the road roughness have a significant influence on separation. By considering a vehicle model of three rigid bodies with four wheels and the randomness of the rail roughness in train-track-bridge system, the possibility of separation and the expectation of the maximum separation distance at different velocities are studied. The results show that it is very useful to carry out a stochastic analysis of the system and consider the influence of separation in vehicle and bridge design. (C) 2015 Elsevier Ltd. All rights reserved.