Dynamic interaction analysis of high speed train and railway structure including post-derailment behaviour during an earthquake

Abstract eng:
In this paper, a simple and efficient computational method to solve for the dynamic interaction of a Shinkansen train (high-speed train in Japan) and railway structure including post-derailment behavior during an earthquake is presented. The motion of the train is modeled in multibody dynamics with nonlinear springs and dampers used. Efficient mechanical models to express interactions between wheel and rail in the pre-derailment and between wheel and the track structure where the guard is attached to prevent the train deviating from the track in the post-derailment are given. Rail and track elements, where in-plane motions of the cross section are expressed in multibody dynamics and out-of-plane motions are expressed by FEM, are presented to solve contact problems between wheel and long railway components effectively. The combined transient dynamic response during an earthquake is obtained by solving equations of motion of the train and railway structure subjected to interactions between wheel and rail in the pre-derailment and between wheel and the track structure attached with the guard in the post-derailment. A modal method is employed to solve largescale nonlinear equations of motions of the train and railway structure effectively. Based on the present method a computer program has been developed for the simulation of a Shinkansen train running on the railway structure including the post-derailment behavior during an earthquake. Numerical examples are demonstrated.

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