Study on the Evolution of Rail Wear and Surface Optimization Based on Different Proportional Wheel-Rail Parameter Combinations
To study the evolution law of rail wear on actual small radius curves,vehicle traveling speed,friction coefficient,and wheel tread type are set proportionally and the influence on rail wear is analyzed.A parametric mod-el of the rail was constructed by using the Non-uniform Rational B-spline curves and the samples were trained.Based on the Radial Basis Function surrogate model,a multi-objective optimization model with the root mean square area of the wheel-rail contact patch ARMS and the contact angle difference Δδ as the objective functions was established.The results show that:Left rail wear exhibits lateral wear,and the wear amount is linearly related to the total weight passing through;right rail wear shows vertical wear,and the wear amount is also linearly related to the passing weight;the optimized surface Opt1 has improved in both the root mean square area of the contact patch ARMS and the contact angle difference Δδ compared to the original surface,with a more uniform distribution of wheel-rail contact points on the Opt1 surface,leading to significant improvements in wear index and dynamic perfor-mance.
small radius curverail wearrail surface optimizationwheel-rail dynamics
NETL
NSTL
万方数据
维普
