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Numerical analysis for coupled train considering 3D wheel/rail contact geometry
Natsumi Nakano,Yoshiaki Terumichi 대한기계학회 2015 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.29 No.7
The purpose of this study is to propose a coupled train model with a multibody system considering three-dimensional wheel/rail contactgeometry and to assess the safety of high-speed railway vehicles. Railway vehicles are becoming lighter and are running at increasedspeeds, so it is necessary to discuss their safety when subjected to a crosswind. In this paper, we use the proposed model in a situationpresupposing strong crosswinds in order to analyze the behavior of coupled trains under this condition. We discuss the modeling andformulation of a coupled train as well as wheel unloading ratios. Our results show that vibration of a car body is largest in the wheelunloading ratios of the car body when the frequency of the car body is close to the second-mode natural frequency of the vehicle system.