机车车轮与重载辙叉的接触与残余应力分析

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英文篇名：Contact and Residual Stress Analysis between Locomotive Wheels and Heavy Haul Frogs 作者：朱黄石 ; 张军 ; 马贺 ; 封全保 英文作者：Zhu Huangshi;Zhang Jun;Ma He;Feng Quanbao;School of Mechanical-Eletronic and Vehicle Engineering,Beijing Key Laboratory of Performance Guarantee on Urban Rail Transit Vehicles,Beijing University of Civil Engineering and Architecture;Tianjin Research Institute for Advanced Equipment,Tsinghua University; 关键词：辙叉 ; 接触斑 ; 等效应力 ; 残余应力 ; 残余变形 英文关键词：frogs;;contact spot;;equivalent stress;;residual stress;;residual deformation 中文刊名：BJJZ 英文刊名：Journal of Beijing University of Civil Engineering and Architecture 机构：北京建筑大学机电与车辆工程学院城市轨道交通车辆服役性能保障北京市重点实验室;清华大学天津高端装备研究院; 出版日期：2017-12-31 出版单位：北京建筑大学学报 年：2017 期：v.33;No.111 基金：国家自然科学基金资助项目(51775031);; “城乡建设与管理”产学研联合研究生培养基地项目(cxy201727) 语种：中文; 页：BJJZ201704012 页数：6 CN：04 ISSN：10-1250/TU 分类号：62-67

摘要

针对大秦重载线路道岔辙叉区疲劳伤损、裂纹、剥离掉块等问题,利用JM3机车车轮型面和标准75 kg/m钢轨12号辙叉型面,建立机车车轮和辙叉区三维有限元接触模型,对辙叉等效应力、表面接触应力和内部残余应力进行有限元弹塑性分析;结果表明:翼轨上距离理论尖端240 mm位置的MISES应力最大,达到1 537 MPa,进入塑性变形阶段,塑性应变会引起材料的残余应力和残余变形;距理论尖端240~420 mm区段残余应力较大,最大可达到945 MPa,主要分布深度在0.5mm左右;机车通过辙叉区段平顺性良好,最大变形相差不大,但距离理论尖端480 mm位置的最大残余变形超出其他位置,达到0.087 mm,该截面位置翼轨磨耗会相对严重.
        Aiming at the problems of frog in Datong-Qinhuangdao heavy haul railway such as fatigue damage,crack and peeling off,the three-dimensional finite element contact models of locomotive wheel and frog are established based on the JM3 locomotive wheel profile and the standard No. 12 frog used in75 kg/m rail. The finite element elastoplastic analysis of the equivalent stress,contact stress and the internal residual stress is carried out. The results show that the largest MISES stress is 1 537 MPa,which is in 240 mm away from the theoretical point of switch rail and the wheel and frog enters the plastic deformation stage. Besides the plastic strain could cause the residual stress and residual deformation of the material. The residual stress in 240 ~ 420 mm away from the theoretical point of switch rail is larger,and the maximum residual stress could reach 945 MPa. And the main distribution depth is about 0. 5 mm.Locomotive has a good ride when passing through the frog,and the maximum deformation is not much difference. While the maximum residual deformation in 480 mm away from the theoretical point of switch rail is beyond that in other positions,which reaches 0. 087 mm. So the wing rail wear would be relatively serious.

引文

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