线接触弹流润滑下固体表面热应力的计算  

CALCULATION OF THERMAL STRESS ON SOLID SURFACE IN ELASTOHYDRODYNAMIC LUBRICATION OF LINE CONTACT

作　　者：路遵友[1,2] 吕延军 LU ZunYou;LV YanJun(School of Mechanical and Precision Instrumental Engineering,Xi'an University of Technology,Xi'an 710048,China;Department of Mechanical and Electrical Engineering,Shandong Vocational College of Light Industry,Zibo 255300,China)

机构地区：[1]西安理工大学机械与精密仪器工程学院,西安710048 [2]山东轻工职业学院机电工程系,淄博255300

出　　处：《机械强度》2020年第3期675-679,共5页Journal of Mechanical Strength

基　　金：国家自然科学基金项目(51375380)资助。

摘　　要：线接触热弹流润滑下,与油膜接触的两固体表面会产生温升变化,固体表面必定会产生热应力,由于固体表面受到了非均匀油膜压力的约束,数值求解固体表面热应力的难度较大。将热力转换原理和热弹性力学理论引入弹流润滑计算中,给出了数值计算方法,实现了固体表面线胀系数的数值求解,解决了热应力和热弹性变形的数值计算,通过算例得到了满足收敛精度的润滑特性和热应力的数值解,并讨论分析了线载荷变化对固体表面热应力的影响。研究内容可为热弹流润滑分析和约束条件下固体热应力分析提供理论基础和数值方法。In line contact thermal elastohydrodynamic lubrication,changes of temperature rise are generated on the two solid surfaces in contact with oil film,and the thermal stresses of the two solid surfaces are bound to be generated.The solid surfaces are constrained by the non-uniformly distributed oil film pressure.It is difficult to solve the thermal stresses on solid surfaces numerically.Both the theory of thermoelasticity and the principle of heat and pressure conversion were introduced into the line contact thermal elastohydrodynamic lubrication,and the numerical method was given to realize the numerical solution of linear expansion coefficients of solid surfaces and solve the numerical calculation of thermal stress and thermal elastic deformation.The numerical results of both the lubrication characteristics and the thermal stresses satisfying the convergence precision were obtained and the influence of the linear load changes on the thermal stresses were discussed by some examples.The research contents could provide reference for thermal elastohydrodynamic lubrication analysis and solid thermal stress analysis under constrained conditions.

关 键 词：线接触 热弹流 热应力 热弹性变形 热力转换 

分 类 号：TH117.2[机械工程—机械设计及理论] O343.6[理学—固体力学]