基于带通滤波的轨道不平顺敏感波长计权评价方法  

Weighted assessment method for sensitive wavelength of track irregularity based on band pass filtering

作　　者：杨翠平 从建力 王源[1] 王平[1] 徐金辉 YANG Cuiping;CONG Jianli;WANG Yuan;WANG Ping;XU Jinhui(MOE Key Lab of High Speed Railway Engineering,Southwest Jiaotong University,Chengdu 610031,China;MOE Engineering Research Center of Railway Environment Vibration and Noise,East China Jiaotong University,Nanchang 330013,China)

机构地区：[1]西南交通大学高速铁路线路工程教育部重点实验室,成都610031 [2]华东交通大学铁路环境振动与噪声教育部工程研究中心,南昌330013

出　　处：《振动与冲击》2019年第19期1-6,共6页Journal of Vibration and Shock

基　　金：国家杰出青年科学基金(51425804);南昌铁路局科技研究开发计划课题

摘　　要：轨道不平顺不同波长成分对列车运行平稳性、舒适性影响程度不同。为了更有效判别轨道的潜在病害,提出一种基于带通滤波的轨道不平顺敏感波长计权评价指标,即轨道加权质量指数(F-TWQI);基于车辆-轨道耦合系统动力响应分析确定敏感波长权重曲线,按1/3倍频程对轨道不平顺进行频域划分并设计相应的带通滤波器,对每个频带的轨道不平顺波形分量的标准差赋权,求和得F-TWQI;以轨检车实测高低不平顺数据为例,对比分析TQI、基于EMD的轨道加权质量指数E-TWQI和F-TWQI与UIC513的相关系数。结果表明:三者相关系数分别处于0.60~0.70、0.70~0.75、0.80~0.85,对敏感波长计权更能反映轨道实际状态;F-TWQI能避免E-TWQI端点效应的局限性,计算效率得到极大地提升,为快速、准确分析铁路工务的潜在安全隐患提供了一种新的方法。Different wavelength components of track irregularity have different effects on train running smoothness and comfort.Here,in order to more effectively identify potential diseases of track,a weighted evaluation index for sensitive wavelength of track irregularity based on band pass filtering was proposed,i.e.,the track weighted quality index(F-TWQI).The weight curve of sensitive wavelength was determined based on dynamic response analysis of vehicle-track coupled systems.Then track irregularity was divided in frequency domain with 1/3 octave and the corresponding band-pass filters were designed.Standard deviations of track irregularity wave components within each frequency band were weighted and summed to obtain F-TWQI.Taking the data measured with an inspection vehicle for track vertical profile irregularity as an example,three correlation coefficients between TQI and UIC513,E-TWQI obtained based on EMD and UIC513,F-TWQI and UIC513,respectively were compared and analyzed.The results showed that three correlation coefficients are in ranges of 0.60-0.70,0.70-0.75 and 0.80-0.85,respectively;sensitive wavelengths being weighted can better reflect track actual state;F-TWQI can avoid limitations of E-TWQI’s endpoint effect to greatly improve computational efficiency,and provide a new method for quickly and accurately analyzing hidden dangers of safety in railway engineering.

关 键 词：轨道不平顺 敏感波长 带通滤波 轨道加权质量指数 

分 类 号：U216.3[交通运输工程—道路与铁道工程]