Study on Wheel Wear of High-speed Train Based on Wheelset Deflection Angle and Radius Difference

The force equilibrium equations of the wheelset with the initial deflection angle and radius difference were built,and the attack angles and lateral displacements of wheels,which with the LM,LMA and S1002 profile respectively,were calculated.Taking the China-made high speed train as an example,the dynamical model of vehicle was built.The influence of the initial deflection angle and radius difference on wheel wear were analyzed on the basis of the FASTSIM algorithm and Braghin wear model.The research results indicate as follows:The initial deflection angle has great effect on the attack angle and the radius difference has great effect on the lateral displacement;great attack angles and lateral displacements are evenmoreliable to be caused by the low equivalent conicity of the treed when manufacturing errors exist;serious eccentric wear is produced by the deflection angle and radius difference,the wear ratio increases rapidly with increasing of the deflection angle and radius difference;the larger the equivalent conicity of the tread,the smaller the wear ratio of the tread;the influence of the running speed on wheel wear is related to magnitude of the deflection angle and radius difference.