空间耦合振动下车轮谐波磨耗对车辆运行安全的影响  

Influence of Wheel Harmonic Wear on Vehicle Operation Safety under Spatial Coupled Vibration

作　　者：胡春红[1] HU Chunhong(Wuhan Vocational College of Software and Engineering,430205,Wuhan,China)

机构地区：[1]武汉软件工程职业学院,武汉讲师430205

出　　处：《城市轨道交通研究》2017年第8期49-54,共6页Urban Mass Transit

基　　金：国家开放大学2016年度项目(G16A2602Y)

摘　　要：车轮谐波磨耗造成的轮轨间高频接触振动和冲击,是高速列车运行不可忽略的问题,会对列车运行安全性造成重大影响。阐述了车轮谐波磨耗形式,建立了包含柔性钢轨及路基的列车-轨道-路基耦合系统动力学仿真模型。根据实测统计数据中最常见的1阶、6阶和11阶谐波磨耗、波深为0.1 mm和0.3 mm的6种典型谐波磨耗进行了轮轨横向振动加速度分析,并研究了轮重减载率、脱轨系数和轮轨横向力3个安全性指标。依托相应铁路行业标准对研究结果进行对比,结果表明:最大轮轨横向振动加速度在6阶0.3 mm和11阶0.3 mm时达到峰值;最大轮轨横向力在6阶0.3 mm和11阶0.3 mm时接近国标限定值;最大轮重减载率在6阶0.3 mm和11阶0.3 mm时超过安全限值;最大脱轨系数在不同形态谐波磨耗下均在安全限度范围内,不会发生脱轨现象。Harmonic wear wheel leads to high-frequency wheel/rail contact vibration and rolling noise,directly affects the safety of train operation.In order to study the this problem,the form of wheel harmonic wear is firstly expounded,then a simulation model of train-track-subgrade coupling system is established.According to the measured data of harmonic wears in the common first-order,sixth-order and eleventh-order,as well as6typical harmonic wear wheelswith0.1mm and0.3mm depth of convolution respectively,the wheel/rail lateral vibration acceleration is analyzed,3safety index including wheel-load reduction rate,derailment coefficient and wheel/rail lateral force are studied.The results show that the maximum wheel/rail lateral vibration acceleration in the6order0.3mm or the11order0.3mm reaches the peak value,the maximum wheel/rail lateral force in the6order0.3mm or the11order0.3mm is close to the national standard limit value,and the maximum wheel-load reduction rate in the6order0.3mm or the11order0.3mm exceeds the safety limit.When the maximum derailment coefficient is controlled in the range of safety limit under different harmonic wear wheel forms,the derailment phenomenon will not occur.

关 键 词：高速列车 轮轨 车轮谐波磨耗 空间耦合振动 

分 类 号：U211.5[交通运输工程—道路与铁道工程] U270.1[机械工程—车辆工程]