基于ANSYS的荷载工况对轮轨接触阻抗的影响

高速铁路站内绝缘节烧损事故时有发生，轮轨接触电阻是引起轮轨电弧造成绝缘节烧损的重要指标，因此准确计算接触电阻是分析绝缘节烧损问题的重要基础，接触电阻的大小主要取决于轮轨接触斑点的面积。对此，通过有限元分析软件ANSYS计算不同荷载工况下轮轨接触面积，分析列车轴重和偏移量对接触电阻的影响规律。结果表明，轴重从9 t增加到27 t时，轮轨接触电阻减小近36.2%；横移量增大10 mm时，轮轨接触电阻减小18.9%。轮轨接触电阻的变化随着轴重和轮轨横移量的增加呈现相同变化趋势。

The influence of load condition on wheel-rail contact impedance based on ANSYS

The burning accidents of insulation joints often occur in high-speed railway stations. The wheel-rail contact resistance is an important factor to cause the burning loss of insulation joints by wheel-rail arc. Therefore, accurate calculation of contact resistance is important for analyzing the burning loss of insulation joint. The level of the contact resistance mainly depends on the area of the wheel and rail contact spots. In this paper, first, the wheel-rail contact area under different working conditions was calculated by ANSYS. Then, the influence of the train axle load and offset on contact spot area was investigated. The results show that when axle load increased from 9 t to 27 t, the wheel-rail contact resistance decreased by nearly 36.2%. The wheel-rail contact resistance decreased by 18.9% when the lateral displacement increased by 10 mm. The change of wheel-rail contact resistance presented the same trend with the increase of axle load and wheel-rail contact resistance.