Dynamic Properties of Coupled Train-Bridge Interaction System

Abstract:

This paper investigates the dynamic properties of each sub-system of a coupled railway train-bridge interaction system. Both spatial beam-plate model and spatial grillage model are built for a long-span dual-deck cable-stayed railway bridge by use of finite element method. The railway train is modeled as a mass-spring-damper system. Then free vibration equations are established based on the finite element models and then subspace iteration method is employed to calculate the dynamic properties for each sub-system. Results show that the spatial grillage model agrees well with the spatial beam-plate model in terms of mass and stiffness distribution. The spatial beam-plate model serves as benchmark solution and the grillage model as a tool for dynamic responses of the coupled system due to its computational efficiency. It also shows that first modes of both the railway train and long-span bridge are lateral direction, which indicates that the train may experience much response in lateral direction. Therefore attention should be drawn to the lateral running stability and safety of railway train due to the coupling effect between the bridge and railway train.

• Periodical: Advanced Materials Research (Volumes 1065-1069)
• Pages: 875-881
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1065-1069.875
• Online since: December 2014
• Authors: Xue Tong Si*, Ke Jian Chen, Wen Hua Guo
• Keywords: Dynamic Properties, Interaction, Long-Span Bridge, Railway Train, Subspace Iteration Method

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