抄録
Because of the vibration and noise caused by trains passing over the rail corrugation, ride comfort and environment affinity deteriorates. To solve these problems, it is necessary to clarify the mechanism of generation and development of corrugation. In this study, by using the 1/10-scale experiment machine that models the real rail road vibration system, the experimental observation is conducted as an approach to clarification of this mechanism. It has an optical loop that makes a turn, straight and curve track. And the condition of this experiment is R10m (correspond to R100m), which is the sharpest curve of conventional lines in Japan. The measurement items are the transition of the rail surface condition and the vertical acceleration of the rail. From the result of the experiments, corrugation generated on the surface of the inner rail. As it goes around multiple times, it was also observed on the outer rail. From the result of rail acceleration, it is confirmed that vibration of dominant frequency influences generation. Moreover, from the result of eigenvalue analysis, the wavelength of corrugation is confirmed to be caused by the vertical vibration system including contact stiffness between the wheel and rail. The result of the experiment of generation and the development of corrugation is reproduced by numerical analysis using MBD software Simpack.
