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. In regard to the relationship between a wheel and a sleeper, we modeled 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. The validity of this model has been evaluated by comparing the calculated results with the measured data. In this paper, we use this model to clarify the relationship between the wheel and sleeper damage, and analyze the characteristics of vertical wheel motion when a wheel runs while continuously impacting sleepers.
展开▼
