线接触热弹流润滑中材料热膨胀系数的计算  

CALCULATION OF THERMAL EXPANSION COEFFICIENT OF MATERIALS IN THERMAL ELASTOHYDRODYNAMIC LUBRICATION OF LINE CONTACT

作　　者：路遵友 LU ZunYou(Department of Mechanical and Electrical Engineering,Shandong Vocational College of Light Industry,Zibo 255300,China;School of Mechanical and Precision Instrumental Engineering,Xi’an University of Technology,Xi’an 710048,China)

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

出　　处：《机械强度》2022年第1期192-197,共6页Journal of Mechanical Strength

基　　金：国家自然科学基金项目(51375380)资助~。

摘　　要：运用线接触热弹性流体动压润滑理论,结合热弹性力学理论和热力转换原理,提出了一种求解线接触热弹流润滑下接触固体表面材料热膨胀系数的方法,能解决油膜压力约束下的非均匀温度场引起的固体表面热弹性变形的求解问题。通过算例求解得到了满足收敛条件的数值解,进一步分析了载荷、卷吸速度和固体材料变化对材料热膨胀系数的影响。研究结果表明:同种金属材料时,半径大的固体表面在计算域内各点的材料热膨胀系数相对较大;载荷增大时,固体表面各点材料热膨胀系数变大;速度增大时,两固体表面材料热膨胀系数会减小;固体密度增大时,固体表面的材料热膨胀系数减小。By combining the thermal elastohydrodynamic lubrication theory,thermoelastic mechanics theory and principle of heat-pressure conversion,a method was presented to solve the material thermal expansion coefficient of solid surface in the thermal elastohydrodynamic lubrication of line contact.It could solve the thermal elastic deformation of solid surface caused by non-uniform temperature field under constraint of oil film pressure.Numerical results satisfying the convergence conditions were obtained by an example,and the influence of load,entrainment speed and solid material on the material thermal expansion coefficient were further studied.When the two solids are the same metal material,the results show that the thermal expansion coefficient of the solid surface with large radius is relatively large at each point in the computational domain;when the load increases,the material thermal expansion coefficient of the solid surface at each point becomes larger;when the entrainment speed increases,the thermal expansion coefficient will decrease;when the density of solid increases,the material thermal expansion coefficient decreases.

关 键 词：线接触 热弹流 热膨胀系数 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] TG113.2[金属学及工艺—物理冶金]