重载铁路小半径曲线地段钢轨波磨数值分析

Numerical Analysis of Rail Corrugation in Small Radius Curve Section of Heavy Haul Railway

摘要: 在重载铁路领域，随着列车行车速度以及轴重的增大，重载铁路曲线地段的轮轨作用力也有明显增加，导致重载铁路曲线段钢轨波磨的程度加深，直接影响了线路的正常服役。这使得每年我国铁路部门都在钢轨的养护维修方面投入大量的人力物力。本文结合神朔重载铁路小半径曲线地段钢轨波磨现状，采用动力学仿真软件SIMPACK建立小半径曲线下列车–轨道耦合模型，对钢轨波磨的产生机理及影响因素进行了分析。研究认为，当列车通过小半径曲线时，轮对的横向自振频率接近或成轨道振动频率的整数倍，是形成钢轨波磨的主要原因；且曲线半径和运行速度对钢轨波磨影响较大。

Abstract: In the field of heavy haul railways, with the increase of the speed and the axle load, the wheel-rail force of the heavy haul railway curve section has also increased significantly, which has led to the deepening of the rail corrugation of the heavy haul railway curve section and directly also has af-fected the normal service of the line. This makes the Chinese government invest a lot of manpower and resources in the maintenance and repair of the rail every year. In this paper, the current situ-ation of rail corrugation in the small radius curve section of Shenshuo heavy haul railway is com-bined with the dynamic simulation software SIMPACK to establish the following vehicle-track coupling model of small radius curve, and the mechanism and influencing factors of rail corrugation are analyzed. The study believes that when the train passes the small radius curve, the lateral natural vibration frequency of the wheel pair is close to or integral with the orbital vibration fre-quency, which is the main reason for the formation of the rail corrugation. Moreover, the curve radius and the running speed have a great influence on the rail corrugation.