车轮踏面擦伤识别方法  

Identification method of wheel tread flat

作　　者：李奕璠 林建辉[2] 刘建新[2] 王开云[2] 陈双喜[2] 

机构地区：[1]西南交通大学峨眉校区机械系,四川峨眉614202 [2]西南交通大学牵引动力国家重点实验室,成都610031

出　　处：《振动与冲击》2013年第22期21-27,共7页Journal of Vibration and Shock

基　　金：国家863计划资助项目(2009AA11Z202);国家自然科学基金资助项目(51075340);第12届高等院校青年教师基金基础性研究课题(121075);牵引动力国家重点实验室自主研究课题(2012TPL_T09)

摘　　要：为研究车辆车轮踏面擦伤的动态检测及识别方法,建立车辆轨道耦合动力学模型及车轮擦伤模型,计算车辆动态响应;通过改进的经验模态分解(Empirical Mode Decomposition,EMD)、Hilbert-Huang变换(HHT)分析方法研究正常车轮与擦伤车轮引起的轴箱垂向振动特征,对比不同深度、长度车轮擦伤的Hilbert谱间差异及车辆运行速度对Hilbert谱影响;用小波包(Wavelet Package,WP)变换对擦伤程度定量判断。研究结果表明,该方法能有效对车轮踏面擦伤进行识别,且不受车速影响。In order to study the dynamic detection and identification method of wheel tread fiat of a railway vehicle, a vehicle-track coupled dynamic model and a wheel fiat model were set up firstly to calculate the vehicle dynamic response. And then, the axle-box vertical vibration characteristics created by a normal wheel and a wheel with fiat, respectively were studied using the improved empirical mode decomposition （EMD） and Hilbert-Huang transformation （HHT）. Hilbert spectral differences between different depth and length wheel fiats were compared and the influence of running speed on Hilbert spectrum was analyzed. Finally, the abrasion level was judged quantitatively with wavelet package （WP） transformation. The results showed that the proposed method can effectively identify wheel tread flat and the running speed has no effect on this method.

关 键 词：踏面擦伤 轴箱垂向振动 Hilbert谱 小波包 

分 类 号：U211.5[交通运输工程—道路与铁道工程]