基于Circular模型的大剪应变率点接触弹流界面滑移数值分析  

Numerical Analysis of EHL Boundary Slip Effect Applying Circular Model under Big Shear Strain Rate

作　　者：刘奕壕 黄柏林[2] 付忠学 郭峰[3] 胡松钰[1] LIU Yihao;WONG Pat lam;FU Zhongxuel;GUO Feng;HU Songyu(College of Mechatronics and Control Engineering, Shen Zhen University, Guangdong Shenzhen 518060, China;Department of Mechanical and Biomedical Engineering, City University of Hong Kong, Hong Kong, China;School of Mechanical Engineering, Qingdao Technological University, Shandong Qingdao 266520, China)

机构地区：[1]深圳大学机电与控制工程学院,广东深圳518060 [2]香港城市大学 [3]青岛理工大学机械工程学院,山东青岛266520

出　　处：《摩擦学学报》2018年第2期129-137,共9页Tribology

基　　金：广东省自然科学基金项目(2014A030310261);深圳市海外高层次人才创新创业专项资金(KQJSCX20160226174209);深圳市科技计划(JCYJ20150625102859322)资助~~

摘　　要：采用Circular流变模型,将假定的流体的极限剪应力特性模型拟合入Reynolds方程,编写Fortran语言程序,数值模拟界面滑移效应.计算从弹流润滑(EHL)延展到动压润滑(HL)区域.随着速度增加,摩擦系数曲线出现反常波动,表现为两个异常拐点.在中、高速度下,模拟获得的接触轮廓等值线图中观测到入口凹陷及中心区下凸.进一步讨论了载荷、速度、综合弹性模量、滑滚比等因素对滑移的影响.界面滑移效应被认为是产生反常接触轮廓和摩擦力波动的主因,与试验结果互为验证.Circular model, assuming limiting shear stress as an intrinsic property of the lubricant, was incorporated into Reynolds equation to simulate slip effect from elastohydrodynamic lubrication （EHL） to hydrodynamic lubrication （HL） regimes. With increasing speed, coefficient of friction showed an abnormal wave, together with an inlet dimple appears on the contact profile. Effects of load, speed, reduced modulus of elasticity and slide-roll ratio were examined. Boundary slid was verified to produce abnormal contact profile and friction variation.

关 键 词：弹流 STRIBECK曲线 摩擦系数 界面滑移 circular模型 

分 类 号：TH117.2[机械工程—机械设计及理论]