Scientific paper ID 501 : 2011/2

The reliability of railway vehicle bogie frame is influenced by many factors. In order to ensure high reliability of bogie frame design, the precondition is to found dominating factors. In this paper using the probability analysis method, the parametric finite element model of bogie frame is established. The plate thicknesses, the service loads and material constants of bogie frame were set as random variable and gotten the distributed parameter values by statistic. The functions of failure state were established by allowed fatigue strength value and maximum principle stress of parent material or weld location of welded bogie frame. The reliability and parametric sensitivities of the random variables were simulated by Monte Carlo Method. Based on the analysis results, the random variables which are sensitivity to reliability of bogie frame will be controlled and optimized in practice so as to design high reliability bogie frame. The method applied in this paper provided a new way to evaluate reliability and parametric sensitivity of the load bearing structure of high speed train.