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International Journal of Railway Technology
ISSN 2049-5358
IJRT, Volume 7, Issue 2, 2018
Study on Contact Model between Wheel and Track Structure after Derailment
K. Goto1, M. Sogabe1, M. Tanabe2 and T. Watanabe1

1Railway Dynamics Division Railway Technical Research Institute, Japan
2Department of Mechanical Engineering Kanagawa Institute of Technology, Japan

Full Bibliographic Reference for this paper
K. Goto, M. Sogabe, M. Tanabe, T. Watanabe, "Study on Contact Model between Wheel and Track Structure after Derailment", International Journal of Railway Technology, 7(2), 1-19, 2018. doi:10.4203/ijrt.7.2.1
Keywords: multi body dynamics, earthquake, derailment, contact model, ballasted track, fastening device, vehicle behaviour.

This study describes the construction of a detailed wheel-track structure contact model to accurately express railway vehicle behaviour after derailment. The model was then incorporated into the numerical analytical program DIASARS III which is able to show railway vehicle behaviour after derailment. Firstly, the proposed method divides the running track into several strips in the rail direction. The geometric irregularity and wheel-track structure contact spring for each strip are defined discretely as a function of the position in the rail direction. Secondly, a method is proposed which can model the phenomenon whereby the derailed wheel collides with or jumps over the rail.

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