个性化设计廓形打磨钢轨在高速铁路小半径曲线波磨病害整治中的应用  

Application of Personalized Design Profile for Grinding Rail in the Treatment of Corrugation Wear in Small Radius Curve of High-speed Railway

作　　者：张翼 ZHANG Yi

机构地区：[1]中铁物总运维科技有限公司,北京100036

出　　处：《铁道技术监督》2024年第1期42-47,共6页Railway Quality Control

摘　　要：我国某高速铁路半径为1 600 m曲线下股钢轨波磨病害严重,采用传统方式打磨后,波磨病害在4个月后再次产生。以现场实测钢轨廓形为基础,分别对该曲线上股、下股廓形进行个性化设计。采用个性化设计廓形打磨钢轨后,钢轨波磨产生周期延长至8个月。通过建立动力学模型和仿真计算,得出如下结论:较传统方式打磨,采用个性化设计廓形打磨钢轨,在轮对横移量为0~9 mm时的轮轨接触轮径差均得到不同程度增大;轮对横移量为6 mm时的轮轨接触锥度由0.087提升至0.133,提升了53%,车轮通过曲线能力明显增加;轮轨接触点均匀分布于轨面,在蛇行运动过程中,接触点在轨面均匀移动,跳跃少;曲线下股蠕滑率平均值的变化率下降89.6%,蠕滑率变化范围的变化率下降80.9%,轮轨运动更接近于纯滚动,轮轨接触状态更加稳定,对延长钢轨波磨病害产生周期有明显作用。In a domestic high-speed railway,the corrugation wear is serious on the lower rail of railway curve with a radius of 1600 m.When the rail is grinded in the traditional way,the corrugation occurred again 4 months later.Based on the actual measurement of rail profile,the profiles of upper and lower rails on the curve are designed person⁃alized.After personalized design profile is adopted for grinding rails,the generation period of the corrugation wear is extended to 8 months.Through the establishment of dynamic model and simulation calculation,the following conclu⁃sions are drawn:compared with the traditional grinding method,when the rail profile is designed personalized to gvind the rail and the wheelset traverse is 0~9 mm,the wheel radius difference of wheel-rail contact increases to vary⁃ing degrees;the conitity of wheel-rail contact increased from 0.087 to 0.133 when the wheelset transverse is 6 mm,which increased by 53%,and the ability of wheels passing through curves increased obviously;points of wheel-rail contact are evenly distributed on the rail surface,and in the process of snaking movement,the contact points move evenly on the rail surface with less jumps;on the lower rail of curve,the change rate of average creep rate and creep rate variation range decrease by 89.6%and 80.9%respectively,the wheel-rail motion is closer to pure rolling,and the wheel-rail contact state is more stable,which has obvious effect on prolonging the generation period of rail corru⁃gation disease.

关 键 词：高速铁路 钢轨磨耗 波形磨耗 小半径曲线 轮轨接触 钢轨廓形 

分 类 号：U213.42[交通运输工程—道路与铁道工程]