曲线半径对钢轨磨损影响的数值计算与试验分析

用数值计算方法详细分析了静态接触情况下,轮轨接触质点间蠕滑力、黏滑区的分布和摩擦功随曲线半径的变化,利用模拟试验研究了曲线半径对钢轨试样磨损特性的影响.结果表明:钢轨磨损量随曲线半径的增大呈非线性减小,在小于1 200 m的小曲线半径范围内,钢轨磨损量值随曲线半径的减小而急剧增大;随着曲线半径的增大,轮轨接触斑中最大滑动量逐渐减小,滑移区的面积减小,而黏着区的面积增大;轮轨接触斑上摩擦功随曲线半径的增大呈非线性的减小.

Numerical and Experiment Analysis of the Effect of Curve Radius on Rail Wear and Rail Failure

The creepage forces, stick/slip areas of contact particles and friction work of wheel/rail in static condition were analyzed by means of numerical methods. The effect of curve radius on rolling wear behavior of rail was investiagted by simulation experiment. The numerical and experimental results indicated that with the decreasing curve radius, the wear of rail increased nonlinearly, especially when the curve radius was less than 1200m, the wear of rail increased rapidly with the decreasing curve radius. And with the increasing curve radius, the most slippage decreased gradually, and the stick areas decreased while the slip areas increased. The friction work of wheel/rail decreased nonlinearly with increasing curve radius. The results offered a reference for researching wear of wheel-rail and investigation the lifetime of rail.