By establishing vehicle-track space coupled model and rail corrugation evaluation model, the generation mechanism of rail corrugation was analyzed in frequency domain and time domain, and development characteristics of corrugation were studied by using corrugation growth rate. Analysis based on frequency domain: through modal analysis and frequency response analysis on the finite element model of track structure, it is found that there are natural frequencies of track structure close to measured corrugation passing frequencies. It shows that the vibration modes corresponding to these frequencies can be more easily excited, which can cause the resonance phenomenon of track structure and form the rail corrugation at corresponding frequencies. Analysis based on time domain: the time-history curves of rail vertical vibration acceleration and rail vertical displacement are calculated by using vehicle-track coupled model and the frequency domain transformation of the time-history data is carried out. It is found that there are characteristic frequencies close to the measured corrugation passing frequencies, which indicates that the vibration of track structure at corresponding frequencies is an important reason to promote the formation of corrugation. The change of vehicle speed has no effect on characteristic frequencies of corrugation growth rate curves, which reflects the fixed frequency characteristic of corrugation. With the increase of train operation times, the corrugation corresponding to characteristic frequencies will gradually form and develop, and the increase of vehicle speed will increase the wavelength range and development speed of rail corrugation.

通过建立车轨空间耦合模型和轨道波纹评价模型，在频域和时域上分析了轨道波纹的产生机理，并利用波纹增长率研究了波纹的发展特征。基于频域的分析：通过对轨道结构的有限元模型进行模态分析和频率响应分析，发现轨道结构的固有频率接近于所测量的波纹通过频率。结果表明，与这些频率相对应的振动模态更容易被激发，从而引起轨道结构的共振现象，并在相应的频率处形成轨道波纹。基于时域的分析：利用车轨耦合模型，计算了轨道垂直振动加速度和轨道垂直位移的时程曲线，并对时程数据进行了频域变换。发现存在与所测波纹通过频率接近的特征频率，这表明轨道结构在相应频率处的振动是促进波纹形成的重要原因。车速的变化对波纹增长率曲线的特征频率没有影响，反映了波纹的固定频率特征。随着列车运行时间的增加，与特征频率相对应的波纹将逐渐形成并发展，