基于城市轨道交通曲线段不同磨耗程度的典型钢轨和车轮的实测型面,利用有限元分析软件ANSYS建立曲线段轮轨三维弹塑性接触有限元模型,对三种不同轮轨磨耗型面匹配工况下的地铁车辆的曲线通过性能以及轮轨接触应力进行计算分析,分析不同磨耗状态下车轮和钢轨接触时的接触应力和轮轨应力的分布状态,并研究其对钢轨磨耗的影响。发现钢轨使用初期,由于轮轨廓形不一致,轮轨间易出现应力集中,应力集中部位易出现磨损;随着钢轨侧磨的增加,轮轨接触状态逐渐由一点接触变为两点接触,且接触点的塑性变形部分和弹性部分的过渡区间易出现裂纹;两点接触状态下,外侧轨距角处接触面积及应力集中区域远大于钢轨侧面部分,轨距角易出现较大的接触压力,易加速钢轨磨耗与疲劳伤损的产生。
Based on the measured rail and wheel profiles of different wear depth of rail on the curve of urban rail transit, using the finite element analysis software, ANSYS, we establish wheel-rail contact three-dimensional elastic-plastic finite element model and then analyse the metro vehicle’s performance, the distribution of wheel-rail contact stress state and its impact on the rail wear under the matching of new wheel’s profile and three kind of rail’s profile. It is prone to have stress concentration on wheel/rail’s contact area because of their profiles’ inconsistency in the early of the rail’s use. And this kind of concentration causes the wear on rail more easily. With the increasing of the rail side grinding, the contact status of wheel and rail gradually change from one-point contact to two-point contact. It is easy to crack on the transition zone between plastic deformation and elastic area of the contact point. Under the two-point contact status, it is easy to arise larger contact pressure on gauge corner because that the outer gauge corners contact area and stress concentration area are much larger than the rail side section. The rail wear and fatigue injury is also more easy to generate in this status.
[1] DAVES W,FISHER F D,FISHER J. Modelling of the wheel-rail contact taking into account micro-structure and material behavior of the contacting materials[C]// Proceeding of the 5th International Conference on Contact Mechanics and Wear of the Wheel/Rail System,Japan：July 25-28,2000：136-141.
[2] JIANG Y Y,SEHITOGLU H. An analytical approach to elastic-plastic stress analysis of rolling contact[J]. ASME Journal of Tribology,1994,116：577-587.
[3] JIANG Y Y,SEHITOGLU H. Rolling contact stress analysis with the application of a new plasticity model[J]. Wear,1996,191：35-44.
[4] 魏先祥. 轮轨静接触时的应力状态[J]. 铁道学报,1991,13(2)：1-11.
WEI Xianxiang. The stress state of the wheel-rail quiet contact[J]. Journal of the China Railway Society,1991,13(2)：1-11.
[5] 俞展猷. 车轮轮缘应力与影响因素的研究[J]. 中国铁道科学,1996,17(1)：68-75.
YU Zhanyou. Research of wheel rim stress and factors[J]. China railway science, 1996,17(1)：68-75.
[6] 邓建中,葛仁星,程正兴. 计算方法[M]. 西安：西安交通大学出版社,1985.
DENG Jianzhong,GE Renxing,CHENG Zhengxing. Computational method[M]. Xi’an：Xi’an Jiaotong University Press,1985.
[7] 温泽峰,金学松. 两种型面轮轨滚动接触蠕滑率/力的比较[J]. 工程力学,2002,19(3)：82-89.
WEN Zefeng,JIN Xuesong. Two types of profiles in rolling contact[J]. Engineering Mechanics,2002,19(3)：82-89.
[8] 卢萍,崔大宾,王宁. 轮轨接触应力数值计算方法[J]. 润滑与密封,2009,34(7)：28-32.
LU Ping,CUI Dabin,WANG Ning. Calculation and analysis method of wheel/rail contact stresses[J]. Lubrication Engineering,2009,34(7)：28-32.
[9] 陶功权,李霞,温泽峰,等. 两种轮轨接触应力算法对比分析[J]. 工程力学,2013,30(8)：229-235.
TAO Gongquan,LI Xia,WEN Zefeng,et al. Comparative analysis of two algorithms for wheel-rail contact stress[J]. Engineering Mechanics,2013,30(8)：229-235.
[10] 侯传伦,翟婉明,邓锐. 曲线磨耗状态下的轮轨弹塑性接触有限元分析[J]. 中国铁道学报,2009,30(5)：28-33.
HOU Chuanlun,ZHAI Wanming,DENG Rui. Finite element analysis of the elastic-plastic contact of the wore wheels and rails on curve[J]. China Railway Science,2009,30(5)：28-33.
[11] 李成辉. 轨道[M]. 成都：西南交通大学出版社,2012.
LI Chenghui. Rail[M]. Chengdu：Southwest Jiaotong University Press,2009.
[12] 罗子健. 金属塑性加工理论与工艺[M]. 西安：西北工业大学出版社,1994.
LUO Zijian. Metal plastic processing theory and technology[M]. Xi’an：Northwestern Polytechnical University Press,1994.
[13] 张银花,陈朝阳,周清跃,等. 钢轨屈服强度指标取值研究[J]. 铁道建筑,2006(6)：92-94.
ZHANG Yinhua,CHEN Chaoyang,ZHOU Qingyue,et al. Research of rail yield strength index value[J]. Railway Engineering,2006(6)：92-94.
[14] 侯传伦. 重载铁路曲线段磨耗状态下轮轨相互作用分析[D]. 成都：西南交通大学,2009.
HOU Chuanlun. Analysis of interaction between wheel and rail on wear state of heavy-haul vehicle on curves[D]. Chengdu：Southwest Jiaotong University,2009.
[15] 金学松,刘启跃. 轮轨摩擦学[M]. 北京：中国铁道出版社,2004.
JIN Xuesong,LIU Qiyue. Tribology of wheel and rail[M]. Beijing：China Railway Publishing House,2004.
[16] 练松良. 铁路曲线钢轨磨耗及其减缓措施[M]. 北京：中国铁道出版社,2001.
LIAN Songliang. Rail wear in curves and mitigation measures[M]. Beijing：China Railway Publishing House,2001.
