In order to investigate the causes and development characteristics of rail corrugation in small radius curve, the wheel-rail contact and creep characteristics and the dynamic responses of wheel-rail system on the common fastener track were analyzed by using the metro vehicle-track dynamic model. The inside wheel-rail creep force appears periodic unsaturated-saturated zonation phenomenon, which makes the wheel-rail interface in the stick-slip state all the time, resulting in rail corrugation eventually. The outside wheel-rail creep force is always saturated, which illustrates that the wear is relatively serious, but it is not easy to form wavy wear with the periodic characteristic. The fluctuation amplitude of wheel-rail vertical/lateral force on the inner rail side is larger than that on the outer rail side, which easily leads to the further development of inner rail corrugation. The characteristic wavelength of the axle box vertical vibration acceleration on the inner rail side appears at 32 mm, closing to the measured wavelength of the inner rail corrugation, which indicates that the wheel-rail system has an unstable vibration at the frequency corresponding to that wavelength, leading to the aggravation of the vibration of system components.
Rail Corrugation Characteristics in Metro Small Radius Curve Track with Common Fasteners
Second International Conference on Rail Transportation ; 2021 ; Chengdu, Sichuan Province, China
ICRT 2021 ; 444-453
2022-02-08
Conference paper
Electronic Resource
English
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