目的 研究科隆蛋扣件弹条结构和参数对地铁小半径曲线钢轨波磨的影响规律。方法 首先构建轮轨系统三维有限元模型，科隆蛋扣件刚度通过均匀分布在轨底的弹簧和阻尼单元模拟，同时在弹条趾端与钢轨接触点处施加弹簧单元，模拟扣件系统中弹条弯曲变形产生的扣压作用。基于复特征值分析法，探究在饱和蠕滑力激励下轮轨系统的稳定性，然后对比分析考虑弹条和不考虑弹条对轮轨系统不稳定振动的影响。最后探讨弹条扣压刚度、弹条预紧力和弹条扣压点间距对钢轨波磨的影响。结果 考虑弹条和不考虑弹条的轮轨系统，在饱和蠕滑力的激励下分别发生了512 Hz和488 Hz左右的自激振动，出现波长38、39.4 mm的短波长波磨。在1.5~17.5 kN/mm范围内，随着弹条刚度的提高，主导的不稳定振动的等效阻尼比先减小后增大，当弹条刚度增至15 kN/mm以上时，等效阻尼比大于?0.001。在弹条刚度低于12.5 kN/mm时，主导的不稳定振动频率约为512 Hz。在刚度高于12.5 kN/mm时，主导的不稳定振动频率为313 Hz。弹条预紧力和弹条扣压点间距的变化并未导致系统等效阻尼比发生显著变化。结论 不考虑弹条时预测波磨波长略大于考虑弹条时的波长，且不考虑弹条的影响时可能会高估波磨发生概率和发展速度;弹条刚度对地铁小半径曲线段频发的短波长波磨的影响显著，将弹条刚度增至15 kN/mm及以上时，可以抑制钢轨波磨的产生;弹条预紧力和弹条扣压点间距对钢轨波磨的影响较小。

Rail corrugation is periodic and non-uniform wear on the rail running surface along the longitudinal direction. It results in vibration and noise, component loosening, detachment and fatigue failure, posing a threat to operation safety and deteriorating the riding experience. It is an important way to solve corrugation by revealing the causes and affecting factors of rail corrugation to propose measures against rail corrugation at the source. The existing theories used to study the corrugation can be divided into two categories of feedback vibration and self-excited vibration. The unstable vibration of the wheel-rail system is accepted as main cause of the corrugation on minor diameter curved rails. However, the rail corrugation modeling established on the basis of friction-induced vibration theory hardly accounts for the fastener clip, which may affect the prediction results. The effect of the fastener clip on rail corrugation is not be considered by the traditional corrugation model.