滑动轴承非线性油膜力研究

Nonlinear film-force of journal bearing

为了掌握轴承的动力学特性 ,实现转子轴承系统的非线性动力学设计 ,提出了附着极限压力边界条件 ,将Reynolds方程的求解问题转化为可分离变量的二阶非线性方程 ,得出了轴承油膜力与载荷相平衡的油膜压力 ,解释了油膜力的作用机理 。

According to the limit pressure boundary condition of a journal bearing, a Reynolds equation can be changed to a 2nd-order nonlinear differential equation, in which variables can be separated. The expression of the film force of limited length journal bearing can be obtained by integrating the equations set. The inertia coefficient and the squeeze coefficient are defined to express the inertia force and the squeeze force of the film force respectively. The film force can clearly explain the mechanism for film force and lay a foundation for further study of the dynamic characteristics of the nonlinear rotor bearing system.