Analysis of Rolling Contact Fatigue of Small Curved Rails and Fatigue Life of Car Axles
In order to investigate the law of rail rolling contact fatigue damage and axle life on small radius curve,the rail fatigue data model was obtained by calculating and analyzing the rail wear on small radius curve based on the established vehicle system dynamics model.The rolling contact fatigue analysis is carried out for the whole damage process of the rail with small radius curve,and the fatigue life of the axle of CRH3 EMU running on the fatigue damaged rail is simply predicted based on the finite element analysis.The conclusions are as follows:(1)At the midpoint of the small radius curve,the outer rail mainly reflects the side wear at the gauge angle,and the inner rail mainly reflects the vertical wear at the top of the rail,and the rolling contact stress and damage of the out-er rail are significantly different from that of the inner rail.(2)The static strength analysis of the wheel set shows that the stress on the the wheel seat on the axle is the largest.(3)Combined with the axle stress and load spectrum,the ax-le fatigue life is predicted,and it is found that the predicted life is about 11.8 a.The life of an axle will be greatly re-duced when running on the line that has already experienced fatigue wear.
small radius curverolling contact fatigue of steel railsfatigue life of car axleswheel-rail interaction
NETL
NSTL
万方数据
