Abstract
As the corrugation on rail surface brings some practical problems about vibration or noise, it is important to investigate and clarify the formation and growth mechanism of the rail corrugation. In this study, the dynamic behavior between wheel and inner-rail is examined using a numerical simulation model and a new simple analytic model for the vehicle running on steep-curved track. It is concluded that both the wheel attack angle and the wheel load fluctuation makes a periodic movement between wheel and rail, i. e. the stick/slip motion, with increasing the rail tilting vibration, and that a small unevenness on the rail surface grows to the corrugation which has a constant wavelength decided by the running speed and the tilting natural frequency of inner-rail. Also, a global corrugation formation process is shown by parametric analyses.
