摘要
假设油膜处于层流状态下,提出了一种求解有限长滑动轴承非线性油膜力的近似解析方法。通常在轴承-转子系统非线性动力学行为分析中,油膜力计算模型采用‘π’油膜假设。但是,实际中油膜存在区域并非是‘π’区域。假设油膜的起始角是0,而终止角需要求解。本文基于变分原理,运用分离变量法求解油膜的压力分布。从计算结果可以看出,提出的方法和有限元方法吻合的很好,同时也分析了油膜力随其它一些参数的变化。
Supposing the oil film at the laminar state,an approximate analytical method is proposed for calculating nonlinear oil film forces of finite length journal bearing. The dynamic ‘π＇oil film assumption is usually taken to determine nonlinear oil film forces in the dynamic analysis of hydrodynamic journal bearing-rotor system. However oil film field is not‘π＇zone. In this paper,the assumption is taken that the start position of the oil film is 0,and the termination position needed to be calculated.Based on the variational principle,the separation of variables is employed to obtain the pressure distribution in this paper. The results calculated by the proposed method are in good agreement with the oil film forces by the finite element method. Meanwhile,the influence of the parameters on the oil film forces is analyzed.
出处
《机械强度》
CAS
CSCD
北大核心
2016年第4期680-685,共6页
Journal of Mechanical Strength
基金
陕西铁路工程职业技术学院常规项目(KY2015-48)资助~~
关键词
油膜力
有限长轴承
分离变量
变分原理
Oil film forces
Finite length journal bearing
Separation of variables
Variational principle
