MT-2型缓冲器结构劣化行为分析  

Analysis on Structural Deterioration Behavior of MT-2 Draft Gear

作　　者：杨能普 张泉 黄刚[1] 刘宸希 周苗 YANG Nengpu;ZHANG Quan;HUANG Gang;LIU Chenxi;ZHOU Miao(College of Railway Transportation,Hunan University of Technology,Zhuzhou Hunan 412007,China;College of Electrical and Information Engineering,Hunan University of Technology,Zhuzhou Hunan 412007,China)

机构地区：[1]湖南工业大学轨道交通学院,湖南株洲412007 [2]湖南工业大学电气与信息工程学院,湖南株洲412007

出　　处：《机床与液压》2025年第4期146-150,共5页Machine Tool & Hydraulics

基　　金：国家自然科学基金青年科学基金项目(52302390);湖南省自然科学基金项目(2021JJ40180);湖南省普通高等学校教学改革研究项目(HNJG-2022-0850,HNJG-20230742)。

摘　　要：针对MT-2型缓冲器内部结构的磨损退化问题,采用ABAQUS仿真软件,结合其几何特征和作用原理建立三维有限元模型,仿真分析了不同冲击速度下缓冲器整个内部结构的应力、温度分布变化规律。实验结果表明:在10.8 km/h的冲击速度下,缓冲器楔块以及动板结构不均匀区域最大应力可达980 MPa,远超其屈服极限;缓冲器楔块垂向接触面中、上、下的应力强度集中区呈现由强至弱的趋势;与楔块不同,动板整个截面上、中、下的应力变化呈现从强到弱的趋势,容易导致楔块以及动板出现凹型或梯度型磨耗;各接触主要摩擦面间的温升现象与结构应力具有相似的分布变化规律。In view of the internal structural wear degradation problem of MT-2 draft gear,a 3D finite element model was established by using ABAQUS simulation software and combining with its geometric characteristics and action principle,and the stress and temperature distribution of the entire internal structure of the draft gear were simulated and analyzed under different impact velocities.The experimental results show that the maximum stress in the non-uniform region of the draft gear wedge and moving plate structure can reach 980 MPa at the impact velocity of 10.8 km/h,which is far beyond the yield limit.The stress intensity concentration area of the vertical contact surface of the draft gear wedge in the middle,up and down is from strong to weak;unlike the wedge,the stress change of the whole section of the moving plate in the up,middle and down shows a trend from strong to weak,which easily leads to concave or gradient wear of the wedge and moving plate.The temperature rise between the main friction surfaces of each contact has a similar distribution and change law to the structural stress.

关 键 词：有限元分析 应力 温度 冲击尖峰 

分 类 号：U260.34[机械工程—车辆工程]