A Method for Safety Evaluation of Train Braking System Considering Multiple Types of Preventive Maintenance Cycles

The train braking system with redundant components has an essential effect on driver safety. In this paper, we consider the failure of K-out-of-N brake motors during operation and recovery by preventive maintenance. Two Continuous Time Markov Chains (CTMC) are used to model working process maintenance corresponding real situation train. Considering intermittent daily cyclical overhaul nested relationships, a new risk assessment is developed evaluate effectiveness Some safety parameters solved based two coupled periods, which conveniently design system. Finally, case study illustrates evaluation method. results show that can trade off effects multiple PM intervals considering redundancy structure proposed model.