Fatigue Lifetime Design Method and Program Development of Pantograph V500 Based on Reliability

Reliability analysis of fatigue lifetime design has two assignments: a. To forecast fatigue lifetime of the structure on given reliability level, b. To evaluate reliability level of the structure on given service conditions, material features and designing dimensions. It aims at evaluating the structure’s designing quality and providing a basis for designing improvement or manufacturing. At mean time, it provides instruction to updating management by parameter of failure rate under given fatigue lifetime.Lastly, this paper presents rain-flow program, lifetime-forcast program and reliability-forcast program, predicting the results of fatigue lifetime of pantograph V500 based on different reliability levels at 500km/h and the results of reliability level of Pantograph V500 under lifetime of 1,200,000km which provide direction of design, manufacturing and general management for Pantograph V500.