高速列车轮轨动态相互作用特征

为了探明高速铁路轮轨动态相互作用特征, 运用铁道机车车辆-轨道耦合动力学理论, 考虑了轮轨系统参振的影响, 研究了高速运营条件下曲线轨道上的轮轨动态接触几何关系, 分析了安全性指标和舒适性指标的随机振动特性。研究结果表明: 在高速运营条件下, 曲线轨道上的轮轨动态接触几何关系具有明显的特点, 在160~300 km·h^-1速度范围内, 减载率及车体振动加速度的敏感波长分别为1.0~2.5 m与40~50 m, 控制该波长范围不平顺对提高动车组的安全性及舒适性十分有利。

Wheel-rail dynamic interaction characteristic on high-speed railway

In order to reveal the wheel-rail dynamic interaction characteristic on high-speed railway, wheel-rail geometric relationship and the random vibration properties of running safety and comfort were carried out by using vehicle-track coupled dynamics theory, and wheel-rail vibration was taken into account.Analysis result shows that there is obvious characteristic of wheel-rail contact geometric relationship when a train passes though curved track at high speed.At the speeds ranging from 160 to 300 km·h-1, the sensitive wavelengths of rate of wheel load reduction and car body vibration acceleration are respectively in the scopes from 1.0 to 2.5 m and from 40 to 50 m.So it is benefit to improve the running safety and comfort of high-speed train while controlling the irregularity with the sensitive wavelengthes.