Fatigue life prediction of train wheel shaft based on load spectrum characteristics

Based on the analysis of load spectrum data, loading sequence and interaction between loads are considered, a fatigue life prediction model based is proposed. The preprocessed probability density function mean amplitude fitted. running condition train analyzed, one-dimensional program wheel axle constructed by extrapolating spectrum. According to modified cumulative damage method, predicted with relevant factors that affect strength part fully considers in model. It more accurately reflects objective facts component process. result has engineering reference significance it provides theoretical basis for design manufacture axles ensuring safe operation.