Rail corrugation can reduce riding comfort by vibration and noise, and even cause running accident. In this paper, the vehicle–track coupled dynamic model was developed for a metro’s tangential track considering the wear in rail materials. The influences of different track structure parameters and vehicle speed on the generation and development of rail corrugation of the tangential track were analyzed using the developed model by the control variable method. The results show that for different parameters, the friction power in wheel–rail contact patch fluctuates with time, but the overall fluctuation range is relatively uniform. Meantime, an analysis of one-third octave curves of the friction power reveals that the characteristic frequencies of friction power are mainly concentrated in the middle and low frequency bands. At the dominant characteristic frequency, the longitudinal stiffness and damping of fasteners, and lateral and vertical damping of fasteners have less influence on rail corrugation, while the lateral and vertical stiffnesses of fasteners, spacing of fasteners, wheel–rail friction coefficient and vehicle speed have greater effect on rail corrugation. The changes in vertical stiffness and spacing of fasteners will cause the characteristic frequency of friction power to be offset, resulting in a shift from 80Hz to 100Hz, which will further lead to rail corrugation of the corresponding wavelength. Thus, it can be concluded that the vertical stiffness and spacing of fasteners have an important impact on the generation and development of rail corrugation at the specific frequency. Besides, the variations of the other variables bring little change to the characteristic frequencies of friction power as well as on rail corrugation. The mechanism of parameters unveiled here provides some guides for the parameter optimization problem on restraining the generation or development of rail corrugation on the tangential track.

中文翻译：

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参数对地铁切线轨道波形的影响

钢轨波纹会因振动和噪音降低乘坐舒适性，甚至造成行驶事故。在本文中，考虑到轨道材料的磨损，建立了地铁切线轨道的车辆-轨道耦合动力学模型。运用所建立的模型，采用控制变量法，分析了不同轨道结构参数和车速对切线轨道轨纹产生和发展的影响。结果表明，对于不同的参数，轮轨接触面积的摩擦功率随时间波动，但整体波动幅度比较均匀。同时，对摩擦功三分之一倍频程曲线的分析表明，摩擦功的特征频率主要集中在中低频段。在主导特征频率下，扣件的纵向刚度和阻尼、扣件的横向和竖向阻尼对钢轨波纹的影响较小，而扣件的横向和竖直刚度、扣件间距、轮轨摩擦系数和车速对钢轨波纹影响较小。对钢轨波纹影响更大。紧固件垂直刚度和间距的变化会导致摩擦功率的特征频率发生偏移，导致从80偏移赫兹至 100Hz，这将进一步导致相应波长的钢轨波纹。因此，可以得出结论，紧固件的垂直刚度和间距对特定频率下钢轨波纹的产生和发展具有重要影响。此外，其他变量的变化对摩擦功率的特征频率和钢轨波纹的影响不大。本文所揭示的参数机制为抑制切线轨道上钢轨波纹的产生或发展的参数优化问题提供了一些指导。