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随着铁路的高速化、重载化,轮轨作用力逐渐增强,进一步深入、准确理解车辆—轨道作用力的特性比以往显得更加重要。该文利用车辆-轨道耦合思想,将轨道以Timoshenko梁建立一层弹性支撑的柔性轨道模型,研究柔性体模态对轮轨力的影响,比较刚性轨道与柔性轨道的区别,探究柔性轨道轨下基础变化对车辆动力学的影响。结果表明,柔性轨道相比刚性轨道能更好地反映出轮轨之间的相互耦合作用,证实了在柔性轨道下的轨枕参数变化对列车动力学性能有一定影响。
As the high-speed and heavy-haul railroads become stronger and the wheel / rail force gradually increases, it is more important than ever to accurately understand the characteristics of vehicle-rail forces. In this paper, by using the idea of vehicle-track coupling, a flexible track model of elastic support is established by using Timoshenko beam to study the effect of flexible modal on wheel-rail force. The difference between rigid track and flexible track is compared, Influence of basic changes on vehicle dynamics. The results show that the flexible track can better reflect the mutual coupling effect between wheel and rail, and it is confirmed that the change of sleeper parameter under the flexible track has certain influence on the train dynamic performance.