基于轨道车辆轴箱加速度的动态轨道不平顺分析  

Analysis of Dynamic Track Irregularity Based on Railway Vehicle Axle Box Acceleration

作　　者：厉鑫波 周劲松 邓辰鑫 孙煜 LI Xinbo;ZHOU Jinsong;DENG Chenxin;SUN Yu(Shaoxing Highway and Transportation Management Center,312099,Shaoxing,China;不详)

机构地区：[1]绍兴市公路与运输管理中心,绍兴312099 [2]同济大学铁道与城市轨道交通研究院,上海201804

出　　处：《城市轨道交通研究》2022年第1期127-133,共7页Urban Mass Transit

基　　金：国家自然科学基金项目(51805373);“十二五”国家科技支撑计划项目(2015BAG19B02)。

摘　　要：提出了一种基于加速度积分算法的动态轨道不平顺计算方法,通过剔除趋势项,选择合理的采样比,提高加速度数据对位移的预测精度。建立了引入轨道不平顺的单轮轨模型,由此得出的一系簧下质量的加速度响应能够反映动态轨道不平顺。以某运营线的地铁车辆作为研究对象,排查了其车轮踏面情况对轴箱振动的影响,对不同线路上的轴箱加速度数据进行动态轨道不平顺预测和对比,并计算不同线路上的车辆平稳性指标。研究结果表明,轨道车辆轴箱加速度响应可以准确反映轨道不平顺特征。故基于轴箱加速度的动态不平顺计算方法能为高密度线路的日常养护工作提供科学依据,同时建议地铁车辆动力学仿真采用美国五级谱。A dynamic track irregularity calculation method based on acceleration integral algorithm is proposed.By eliminating the trend term and choosing a reasonable sampling ratio,the accuracy of displacement prediction by acceleration data is improved.A single wheel-rail model introduced with track irregularity is established,and the obtained acceleration response of mass under the primary spring can reflect the dynamic track irregularity.Taking the metro vehicle of certain operation line as the research object,the influence of wheel tread on axle box vibration is investigated.The dynamic track irregularity prediction and comparison are carried out towards acceleration data of axle box on different lines,and the vehicle stability index on different lines is calculated.Research results show that the acceleration response of axle box can accurately reflect the characteristics of track irregularity.Therefore,the calculation method of dynamic irregularity based on axle box acceleration can provide a scientific basis for the daily maintenance of high-density lines.The fifth-grade track irregularity PSD of U.S.railways is suggested for dynamic simulation of metro vehicles.

关 键 词：轨道车辆 动态轨道不平顺 时域积分 轨道谱 

分 类 号：U213.2[交通运输工程—道路与铁道工程]