摘要
为研究函数型摩擦系数对轮轨滚动接触行为的影响,建立三维轮轨高速滚动接触有限元模型,针对钢轨表面平顺和存在波磨两种工况,通过与库伦摩擦模型的结果对比,详细分析函数型摩擦系数对轮轨力、黏滑分布和接触区域滚动接触应力等接触行为的影响,为进一步研究轮轨材料的损伤机制提供依据。研究发现:(1)无论钢轨表面平顺还是存在波磨,函数型摩擦系数均不会影响法向接触解;(2)函数型摩擦系数会显著影响切向应力的分布,进而影响von Mises等效应力的幅值;(3)基于安定理论,非稳态滚动条件下,相比库伦型摩擦系数,函数型摩擦系数使轮轨表面材料更易遭受疲劳破坏。
In order to study the influence of slip-dependent friction on wheel/rail rolling contact behavior,a 3D finite element model for the high-speed wheel/rail rolling contact was developed.Based on the two cases of wheel/rail smoothness and rail corrugation,this paper investigated the differences of wheel/rail contact force,stick-slip distribution and rolling contact stress between coulomb friction and slip-dependent friction,which can establish a solid basis for further study on the damage mechanism of wheel/rail materials.Simulation results showed that（1）regardless of smooth rail surface or rail corrugation,the slip-dependent friction had no influence on normal contact solutions;（2）the slip-dependent friction can produce a significant effect on the distribution of tangential stress,furtheraffecting the amplitude of von Mises effective stress;（3）based on shakedown theory,the wheel/rail materials are easily subject to fatigue failure in slip-dependent friction under non-steady rolling contact,compared with coulomb friction.
作者
安博洋
马道林
王平
徐井芒
杜彦良
AN Boyang MA Daolin WANG Ping XU Jingmang DU Yanliang(Key Laboratory of High-speed Railway Engineering, Ministry of Education, Southwest Jiaotong University, Chengdu 610031, China School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China Structural Health Monitoring and Control Institute, Shijiazhuang Tiedao University, Shijiazhuang 050043, China)
出处
《铁道学报》
EI
CAS
CSCD
北大核心
2017年第7期98-104,共7页
Journal of the China Railway Society
基金
国家自然科学基金(51425804
51378439
51608459)
中国铁路总公司科技研究开发计划(2015G006-C
2016G008-D)
关键词
函数型摩擦系数
显式有限元
滚动接触解
钢轨波磨
高速铁路
slip-dependent friction
explicit finite element method
rolling contact solution
rail corrugation
high-speed railway
