制动工况下快捷货车轮轨磨耗与疲劳损伤研究  

Study on Wheel Rail Wear and Fatigue Damage of Fast Freight Wagon Under Braking Condition

作　　者：李振华[1] 王开云 王超[2] LI Zhenhua;WANG Kaiyun;WANG Chao(School of Mechanical Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China;State Key Laboratory of Traction Power,Southwest Jiaotong University,Chengdu 610031,China)

机构地区：[1]兰州交通大学机电工程学院,兰州730070 [2]西南交通大学牵引动力国家重点实验室,成都610031

出　　处：《机械科学与技术》2024年第12期2154-2160,共7页Mechanical Science and Technology for Aerospace Engineering

基　　金：国家自然科学基金项目(U19A20110);甘肃省高等学校创新基金项目(2021B-114);兰州交通大学校青年科学基金项目(2018011)。

摘　　要：为研究快捷货运列车通过曲线时压钩力对轮轨磨耗与疲劳损伤的影响,基于车辆-轨道耦合动力学理论和轮轨磨耗损伤理论,建立快捷货运列车动力学模型和疲劳损伤预测模型,分析快捷货运列车在制动工况下制动初速、曲线半径、曲线超高等因素对车轮损伤的影响规律。研究结果表明:制动与惰行两种工况下,车轮损伤情况均呈现内侧车轮以疲劳损伤为主,外侧车轮以磨耗损伤为主的损伤规律;较大的压钩力对内侧车轮损伤影响更显著;列车制动初速大于100 km/h时,轮轨磨耗与疲劳损伤更显著;曲线半径越小快捷货车车轮损伤越严重,列车在半径小于600 m曲线运行时外侧车轮易出现轮缘磨耗;适当减小曲线超高有利于降低轮轨磨耗与疲劳损伤。In order to study the influence of the coupler force on the wheel rail wear and fatigue damage when fast freight train pass through curves,the dynamic model and fatigue damage prediction model of fast freight train were established based on vehicle track coupled dynamics and wheel rail wear theory,and the influence of initial braking speed and curve radius and curve superelevation on wheel damage was analyzed.The results show that,the fatigue damage occurs to inner wheel and wear damage occurs to outer wheel when the train under braking condition or idle running condition.The coupler force has more influence on the fatigue damage of the inner wheel.When the initial braking speed of the fast freight wagon exceeds 100 km/h,wheel rail wear and fatigue damage are more serious.The smaller the curve radius is,the more serious the wheel damage of the fast freight wagon is.When the curve radius is less than 600 m,the outer wheel will have flange wear.Some reduction of curve superelevation is benefit for reducing wheel rail wear and fatigue damage.

关 键 词：快捷货车 压钩力 曲线半径 曲线超高 车轮损伤 

分 类 号：U272.1[机械工程—车辆工程]