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PROCEEDINGS OF THE FIRST INTERNATIONAL CONFERENCE ON RAILWAY TECHNOLOGY: RESEARCH, DEVELOPMENT AND MAINTENANCE
Edited by: J. Pombo
Numerical Analysis of Derailed Vehicle Motion from Wheel-Sleeper Impacts
H. Sunami1, Y. Terumichi2 and M. Adachi1
1Technology Research and Development Department (Komaki), General Technology Division, Central Japan Railway Company, Ohyama, Komaki, Aichi, Japan
H. Sunami, Y. Terumichi, M. Adachi, "Numerical Analysis of Derailed Vehicle Motion from Wheel-Sleeper Impacts", in J. Pombo, (Editor), "Proceedings of the First International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Stirlingshire, UK, Paper 30, 2012. doi:10.4203/ccp.98.30
Keywords: railway, vehicle dynamics, derailment, impact.
The impact between a wheel and a sleeper is one of the most important issues for analyzing derailed vehicle motion. The authors have developed a vehicle model that meets derailment conditions that includes wheel-sleeper impacts . With regard to the relationship between a wheel and a sleeper, we modelled three cases based on full-scale running tests under derailment conditions: when the wheel damages the sleeper; when the wheel runs on the sleeper surface; and when the wheel jumps over the sleeper. In this model, the damage to the sleeper is simply represented by the spring and damper. We have modeled a nine degree of freedom half car model that includes wheel-sleeper impacts. The validity of this model has been evaluated by comparing the calculated results with the measured data. Using this model and the simple model which consists of one wheel and one sleeper, we analyzed the motion of a derailed wheel and bogie frame, especially in a vertical direction, and found following conclusions.
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