高速铁路板式轨道参数与动力特性的研究

Research on Parameters and Dynamic Properties of High-Speed Railway Slab Tracks

运用板式轨道-路基系统半空间垂向耦合的动力计算模型,研究了高速铁路板式轨道的动力特性,探讨了板式轨道的CA砂浆垫层厚度和扣件刚度对系统动力性能的影响规律。扣件、轨下胶垫和CA砂浆层的弹性、阻尼特性对轨道及轨下结构动力性能的影响极大,减少扣件或轨下胶垫的刚度、增加CA砂浆层的厚度,可改善板式轨道的动力学性能。

Based on the theory of slab track-roadbed system coupling dynamics, a semi-spatial timing coupled vertical roadbed-slab track interaction model is developed, and the dynamic properties of slab tracks used in high-speed railways are investigated. The effects of the elasticity and damping of the CA layer and stiffness of fastener-rubber pad structures under the slab on system dynamics are also analyzed. The spring-damping properties of fastener-rubber pads system and CA layer have influenced greatly on the dynamic characteristics of the track structure and roadbed system. The dynamic properties of the track and roadbed can be improved to reduce the stiffness of the fastener-rubber pad structures, or increase the thickness of the CA layer.