To scientifically characterize the dynamic mechanical characteristics of the rubber pad under the rail of fasteners and its influence on the dynamic response of the vehicle-rail-viaduct system, taking the rubber pad under the rail of WJ-7B high-speed railway (HSR) with constant resistance as an example, a TFDV model was applied to characterize the viscoelasticity of the rubber pad and the theoretical model in the dynamic coupling of vehicle-rail-bridge was also studied. The results show that the energy storage modulus and loss factor of rubber pad under rail show a curved surface relation versus the change of frequency-temperature. In a certain frequency/temperature range, the energy storage modulus and loss factor of rubber pad under rail increase with the decrease of temperature and the increase of frequency, and the influence of low temperature on dynamic parameters is more significant. With the decrease of temperature, the minimum value of total dynamic flexibility decreases, and the corresponding extreme frequency shifts to high frequency. Viscoelastic dynamic features of rubber pad under rail mainly affect the dynamic response of vehicle subsystem and rail-bridge subsystem. With the decrease of ambient temperature of rubber pad, the dominant frequency band of power spectrum curve of each structure shifts to high frequency.

中文翻译：

---

深入了解轨下橡胶垫对车辆-轨道-高架桥系统动力学的影响

以WJ-7B高速铁路（HSR）轨道下橡胶垫为研究对象，科学表征扣件轨下橡胶垫的动态力学特性及其对车-轨-高架系统动力响应的影响以恒阻为例，应用TFDV模型表征橡胶垫的粘弹性，并研究了车-铁-桥动力耦合的理论模型。结果表明，轨下橡胶垫的储能模量和损耗因子随频率-温度的变化呈曲面关系。在一定的频率/温度范围内，轨下橡胶垫的储能模量和损耗因数随着温度的降低和频率的增加而增加，而低温对动态参数的影响更为显着。随着温度的降低，总动态柔度的最小值减小，相应的极端频率向高频偏移。轨下橡胶垫的粘弹性动力特性主要影响车辆子系统和轨桥子系统的动态响应。随着橡胶垫环境温度的降低，各结构功率谱曲线的主频带向高频移动。轨下橡胶垫的粘弹性动力特性主要影响车辆子系统和轨桥子系统的动态响应。随着橡胶垫环境温度的降低，各结构功率谱曲线的主频带向高频移动。轨下橡胶垫的粘弹性动力特性主要影响车辆子系统和轨桥子系统的动态响应。随着橡胶垫环境温度的降低，各结构功率谱曲线的主频带向高频移动。