重载机车车轮擦伤下的轮轨动态响应  

WHEEL/RAIL DYNAMIC RESPONSES DUE TO THE WHEEL FLAT OF HEAVY-HAUL LOCOMOTIVES

作　　者：杨逸凡 凌亮[1] 杨云帆[1] 王开云[1] YANG Yi-fan;LING Liang;YANG Yun-fan;WANG Kai-yun(State Key Laboratory of Traction Power,Southwest Jiaotong University,Chengdu 610031,China)

机构地区：[1]西南交通大学牵引动力国家重点实验室,成都610031

出　　处：《工程力学》2020年第12期213-219,共7页Engineering Mechanics

基　　金：国家杰出青年科学基金项目(51825504)。

摘　　要：车轮踏面擦伤会造成剧烈的轮轨冲击作用,加剧车辆和轨道结构部件的疲劳破坏。为揭示实际车轮擦伤状态下的重载机车-轨道耦合振动响应特征,基于车轮擦伤的现场实测数据,拟合出了车轮擦伤模型。采用重载机车-轨道耦合动力学模型,详细考虑了钢轨垫层与扣件弹条相互作用,分别从时域和频域角度仿真计算了机车车轮擦伤引起的轮轨动态响应。研究结果表明:实际车轮擦伤呈不对称的几何形状;车轮擦伤激起的冲击力对轨道部件影响较大;车轮擦伤可能引发钢轨与扣件系统的短暂分离。研究结果可为踏面损伤识别、轨道部件检修提供理论参考。The wheel flat will cause a severe wheel/rail impact, thus aggravating fatigue damage to vehicle and track components. To reveal the characteristics of the coupled vibration response of heavy-haul locomotives and tracks due to actual wheel flat, a fitting model for wheel flat was established based on the field measured data.Using a heavy-haul locomotive-track coupled dynamic model that considers the interaction between the rail pad and fastening clip in detail, the wheel/rail dynamic response caused by locomotive wheel flat was simulated and analyzed in time and frequency domains. The results show that the geometry of the actual wheel flat was not symmetrical. The P2 force induced by the wheel flat had a great influence on the track components. The wheel flat would cause temporary separation between the rail and the fastening system. This research provided a theoretical reference for identifying locomotive wheel tread damages and maintaining heavy-haul track components.

关 键 词：重载机车 车轮擦伤 频谱分析 轮轨冲击 车辆-轨道耦合振动 

分 类 号：U211.5[交通运输工程—道路与铁道工程]