高速铁路路桥过渡段轮轨力分析

Wheel-Rail Force Analysis in Embankment-Bridge Transition Section of High-Speed Railway

通过武广客运专线某路桥过渡段的现场车检数据分析，对高速铁路路桥过渡段轮轨力随列军速度的变化规律进行研究。结果表明，动车通过路桥过渡段时轮轨垂向力明显增大，且当车速达300km·h^-1及以上时增幅更加明显；在200-340km·h^-1车速范围内，轮轨垂向力的变化范围为31．1～100．46kN，最大轮轨垂向力是过渡段内轮轨垂向力有效值的125％～147％；各速度级下的轮轨垂向力均符合正态分布，其平均值基本在50～60kN范围内，但动车速度越大，轮轨垂向力值越离散；置信概率为99．4％时预测的过渡段上最大轮轨垂向力值在71～90kN范围内。

The change rule of wheel-rail force with train speed in the embankment-bridge transition section of high-speed railway was studied by analyzing the train test data of a certain embankment-bridge transition section of Wuhan-Guangzhou passenger dedicated line. The results show that wheel-rail vertical force is significantly increased while EMU passing through the embankment-bridge transition section, and the trend of increase is more obvious when the train speed is up to 300 km · h^-1 or above. The variation range of the wheel-rail vertical force is 31.1-100. 46 KN when the speed range of train is 200-340 km · h^-1. The maximum wheel-rail vertical force is 125-147% of the virtual value of the wheel-rail vertical force in embankment-bridge transition section. The value of wheel-rail vertical force of each level speed conforms to the normal distribution, the range of the average value is about 50-60 kN, but the value of wheel-rail vertical force is more discrete with the increase of train speed. When confidence probability is 99.4%, the predicted maximum value of wheel-rail vertical force in the embankment-bridge transition section is 71-90 kN.