微极性流体对轴承转子的影响

›› 2016, Vol. 29 ›› Issue (2): 20-.

微极性流体对轴承转子的影响

曹学秀,孙保苍

(江苏大学土木工程与力学学院,江苏镇江 212013)

出版日期:2016-02-15 发布日期:2016-02-25
作者简介:曹学秀(1988—),女,硕士研究生。研究方向:轴承转子系统非线性动力学。

Impact of Micro-polar Fluids on Journal Bearing-Rotor System

CAO Xuexiu,SUN Baocang

(School of Civil Engineering and Mechanics,Jiangsu University,Zhenjiang 212013,China)

Online:2016-02-15 Published:2016-02-25

摘要/Abstract

摘要：

通过变分原理求解微极性流体润滑的Reynolds方程得到轴承转子的油膜力,以有限宽刚性Jeffcott转子为研究对象,给出了适用于微极性液体润滑剂的广义雷诺方程,用数值积分法研究了不同参数变化下有限宽轴承转子系统的非线性动力学行为。借助分岔图、Poincare映射图、时间历程图和谱分析等分析了系统的运动形态。数值分析结果表明,系统存在着拟周期运动,且在不同的参数下微极性效应越明显,即L0越小N越大系统越稳定。

关键词: 转子系统, 微极性流体, 非线性动力学, 变分法, 分岔图, 拟周期运动

Abstract:

The oil-film force of the journal bearing with micro-polar fluid is obtained based on the variational principle.With the rigid Jeffcott rotor as the research object,the nonlinear dynamical behavior of journal bearing-rotor system under different parameters is studied by using numerical integration.The motion morphological of the system is studied by combined bifurcation diagram,Poincare map,time history map and spectral analysis.Numerical results show that there exist many complicated nonlinear dynamics quasi-periodic motion and that micro-polar fluids can effectively improve the stability of the system when bigger Nor smaller L₀.

Key words: rotor system;micro polar fluids;nonlinear dynamics;variational method;bifurcation map;quasi periodic motion

中图分类号:

TH113

曹学秀,孙保苍. 微极性流体对轴承转子的影响[J]. , 2016, 29(2): 20-.

CAO Xuexiu,SUN Baocang. Impact of Micro-polar Fluids on Journal Bearing-Rotor System[J]. , 2016, 29(2): 20-.