지하철 7호선 차륜의 구름 및 미끄럼 접촉으로 인한 피로손상 예측 연구

초록

In this study, a contact fatigue damage of railway wheel and the effect of friction coefficient on the stress distribution were analysed during its rolling and sliding. A FEM analysis was performed using a 3D modelling of rail and wheel. In order to predict the contact fatigue initiation, several methods for multiaxial stress fatigue damage prediction such as strain-lifetime method, maximum principle strain method,Smith-Watson-Topper method, were adopted. Finally, safety of the wheel and evaluated and the optimal re-profililing frequency of the wheel was discused.