摘要
为了研究钢轨在轨距角处打磨量对高速列车异常低频晃动的影响,通过对标准CN60廓形和实测轨距角过渡打磨廓形的插值,得到了一组对应不同磨耗量的钢轨廓形。以某型动车组为研究对象,并选取标准S1002CN为车轮踏面廓形,计算分析了其与不同钢轨廓形匹配下轮轨接触关系以及车体横向振动响应的变化规律。分析结果表明,随着钢轨轨距角处打磨量的增大,其与标准S1002CN踏面匹配下的等效锥度逐渐减小,轮轨接触点位置逐渐集中至踏面名义滚动圆附近和轨顶附近,车体横向振动加速度主频减小且幅值增大,相应的横向平稳性指标增大。基于此,筛选出了其中1个钢轨廓形作为临界廓形,用于限定钢轨打磨的合理范围。
To study the influence of the polished depth of rail profile at the gauge angle on the low-frequency vibration of highspeed train,a group of rail profiles were obtained by interpolating between the standard CN60 profile and the measured rail profile which was excessively polished at the gauge angle.Choosing a certain type of EMUs as the research object,and selecting the standard profile S1002CN as the wheel profile,the evolution law of the wheel-rail contact relationship and the lateral vibration of the carbody were calculated and analyzed when it matched with different rail profiles.The analysis results showed that with the increasing of grinding depth at the rail gauge angle,the equivalent conicity under the matching relationship between the rail and the standard profile S1002CN decreased gradually,and the wheel-rail contact points moved to the nominal rolling circle of the tread and the rail top.Moreover,the frequency of the vibration decreased while the amplitude of vibration and the lateral sperling index increased.Finally,one of the rail profiles was selected as the critical profile to limit the reasonable range of rail grinding.
作者
陈经纬
崔涛
孙建锋
王蔚
CHEN Jingwei;CUI Tao;SUN Jianfeng;WANG Wei(CRRC Tangshan Co.,Ltd.,Tangshan,Hebei 063035,China;State Key Laboratory of Traction Power,Southwest Jiaotong University,Chengdu,Sichuan 610031,China;School of Mechanical Engineering,Southwest Jiaotong University,Chengdu,Sichuan 610031,China)
出处
《机车电传动》
北大核心
2020年第5期128-131,137,共5页
Electric Drive for Locomotives
基金
“十三五”国家重大专项(2016YBF1200401-02-04)
四川省科技计划项目(18MZGC0184)。
关键词
高速列车
低频晃动
轮轨匹配关系
钢轨打磨
空间插值
仿真
钢轨
high-speed train
low frequency hunting
wheel-rail contact relationship
rail grinding
spatial interpolation
simulation
rail
