Insights into the Effect of WJ-7 Fastener Rubber Pad to Vehicle-Rail-Viaduct Coupled Dynamics
Insights into the Effect of WJ-7 Fastener Rubber Pad to Vehicle-Rail-Viaduct Coupled Dynamics
复制标题
DOI：
10.3390/app10051889
复制
发表时间：
2020-03-01
影响因子：
2.7
通讯作者：
Qin, Jialiang
中科院分区：
文献类型：
--
作者：
Liu, Linya;Zuo, Zhiyuan;Qin, Jialiang
高速铁路（HSR）长期以来一直是科学界和工程界关注的热点，以提高高速铁路的长期高质量服务。以高速铁路WJ-7 B型小阻力扣件橡胶垫为研究对象，通过温度扫描试验确定扣件橡胶垫的力学参数，并采用动柔度法将其引入车辆-轨道-高架桥垂向耦合模型。将轨道不平顺谱视为固定点激励，研究扣件橡胶垫对轨道动力响应的温度效应。结果表明，扣件橡胶垫的刚度具有低温敏感性和高温稳定性，温度变化对车体垂向动力响应影响较小。随着扣件橡胶垫温度的升高，钢轨动柔度幅值增大，主频降低。随着扣件橡胶垫温度的升高，轮轨力、轮对和轨道-高架桥系统的竖向动力响应逐渐减小，峰值频率也遵循类似的规律。而在高温环境下，扣件橡胶垫的温度相关刚度对轨道-高架桥系统竖向动力响应的主频峰值影响不大。
The high-speed railway (HSR) has been a long-term hotspot in both scientific and engineering societies to enhance the long-term high quality HSR service. This study aims to investigate the WJ-7B type small resistance fastener rubber pad applied in HSR, and temperature sweep test is applied to determine the mechanical parameters of the fastener rubber pad, which are hereafter introduced into the vehicle-track-viaduct vertical coupling model via dynamic flexibility method. The track irregularity spectrum is considered as fixed-point excitation to investigate the temperature-dependent effect of fastener rubber pad on the dynamic responses. The results reveal that the rigidity of the fastener rubber pad is low temperature sensitive and high temperature stable, and the temperature variation has little effect on the vertical dynamic responses of the vehicle. The dynamic flexibility of the rail increases in amplitude and the dominant frequency decreases as the temperature of the fastener rubber pad increases. The vertical dynamic responses of the wheel-rail force, the wheelset and the rail-viaduct system gradually decrease as the temperature of the fastener rubber pad increases, and the peak frequency follows the similar rule. While under high temperature circumstances, the temperature dependent stiffness of the fastener rubber pad has little influence on the peak of the dominant frequency in the vertical dynamic response of the track-viaduct system.