高速行车条件下3种轨道结构的轮轨动力性能对比分析

Contrastive Analysis of Wheel/Rail Dynamic Performance of Three Track Structures for High-Speed Railway

针对某时速400 km宽轨距高速铁路,选取了有砟轨道、减振型和非减振型CRTSⅢ型板式无砟轨道3种轨道类型,基于车辆-轨道耦合动力学理论,对比分析了高速行车条件下3种轨道结构的轮轨动力性能。研究结果表明:高速列车通过3种轨道时具有良好的安全性和平稳性,轨道的动态变形满足要求;2种无砟轨道的钢轨横向振动位移基本相同,且明显小于有砟轨道的钢轨横向振动位移,减小约30%,3种轨道的轨距动态扩大量差异很小;3种轨道的钢轨垂向振动位移差异明显,减振型无砟轨道的钢轨垂向振动位移最大,最大值为1.86 mm,非减振型无砟轨道的钢轨垂向振动位移最小,仅为减振型无砟轨道位移的一半左右。

Three track structures for 400 km/h high-speed railway with wide gauge, including ballasted track,anti-vibration and regular CRTS Ⅲ slab ballastless track,were adopted and the wheel/rail dynamic performance of three track structures for high-speed railway was contrastivelyanalyzed based on vehicle-track coupled dynamics theory. The results indicate that the train is of safety and stability while running on three wide tracks,and the dynamic deformation of three types of tracks satisfy the requirements. The lateral vibration displacement of rails for two ballastless tracks are similar,and the values of both are about 30% less than that of the ballasted track. The difference of dynamic extensive magnitude of gauge between three tracks is minimal. Obvious differences exist in the vertical vibration displacement of rails for three types of tracks,and the anti-vibration ballastless track has maximum rail vertical vibration displacement, which is 1. 86 mm, while the regular ballastless track has the minimum value which is about half of the corresponding value of the antivibration ballastless track.