材料层状非均匀条件下的轮轨二维滚动接触理论模型  

Two-dimensional Wheel-Rail Rolling Contact Theoretical Model under Layered Non-uniformity of Material Properties

作　　者：陈帅 赵国堂[1,2] 刘金朝 赵磊 王平 王衡禹[5] CHEN Shuai;ZHAO Guotang;LIU Jinzhao;ZHAO Lei;WANG Ping;WANG Hengyu(School of Civil Engineering,Southwest Jiaotong University,Chengdu 610031,China;China State Railway Group Co.,Ltd.,Beijing 100844,China;Infrastructure Inspection Research Institute,China Academy of Railway Sciences Corporation Limited,Beijing 100081,China;Railway Engineering Research Institute,China Academy of Railway Sciences Corporation Limited,Beijing 100081,China;State Key Laboratory of Rail Transit Vehicle System,Southwest Jiaotong University,Chengdu 610031,China)

机构地区：[1]西南交通大学土木工程学院,四川成都610031 [2]中国国家铁路集团有限公司,北京100844 [3]中国铁道科学研究院集团有限公司基础设施检测研究所,北京100081 [4]中国铁道科学研究院集团有限公司铁道建筑研究所,北京100081 [5]西南交通大学轨道交通运载系统全国重点实验室,四川成都610031

出　　处：《铁道学报》2024年第12期96-103,共8页Journal of the China Railway Society

基　　金：国家自然科学基金(51775454);四川省自然科学基金(2024NSFSC0946);中央高校基本科研业务费(2682024CX024)。

摘　　要：除有限元外,传统轮轨滚动接触理论计算模型均基于材料均匀假设,为研究材料性能在非均匀条件下的轮轨接触问题,提出一种计算效率高于有限元的二维轮轨滚动接触理论模型。通过接触力学理论和分层模型,结合Fourier变换技术,得到存在非均匀层的钢轨在法向作用力下的位移基本解;通过积分和叠加原理,得到钢轨表面存在非均匀层条件下的轮轨接触力;以存在脱碳层的钢轨为例,分析钢轨脱碳层对轮轨接触力的影响。结果表明:随着钢轨表面残留脱碳层厚度的增加,接触斑尺寸增大,轮轨法向和切向接触力降低。计算结果与Carter理论、有限元结果进行对比,验证本模型的有效性,为存在非均匀层条件下的轮轨接触提供一种除有限元方法外的高效率的数值算法。Traditional wheel-rail rolling contact theory calculation models are based on the assumption of the uniformity of material properties except the finite element method.To study wheel-rail rolling contact problem under non-uniformity of material properties,a two-dimensional wheel-rail rolling contact model with higher computational efficiency than finite element method was proposed.Firstly,the displacement fundamental solution of rails with non-uniformity of material properties under normal loads was obtained using contact mechanics theory,hierarchical model and Fourier integral transform technique.Secondly,the wheel-rail contact forces were calculated by using integral and superposition principle.With the rail with decarbonized layer as an example,the influence of rail decarburized layer on the wheel-rail contact force was studied.The results show that the wheel-rail contact increases and the the normal and tangential wheel-rail contact forces decrease with the increase of the thickness of the residual non-uniform decarburized layer on the rail surface.The model proposed in this paper was verified by comparing the results with those calculated using Carter theory and finite element method,providing an efficient numerical algorithm besides the finite element method for the wheel-rail contact analysis under non-uniformity of material properties.

关 键 词：材料非均匀 分层模型 接触力学 轮轨滚动接触理论 

分 类 号：U211.5[交通运输工程—道路与铁道工程]