Stability and bifurcation of symmetrical rotor in self-acting gas journal bearings

KANG Wei; ZHANG Jia-zhong; LIU Yan; REN Sheng

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Stability and bifurcation of symmetrical rotor in self-acting gas journal bearings

更新时间：2026-07-07

- Stability and bifurcation of symmetrical rotor in self-acting gas journal bearings
- Vol. 22, Issue 9, (2007)
- 作者机构：
  
  1. 西安交通大学能源与动力工程学院,西安,710049
  2. 西北工业大学机电工程学院,西安,710072
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2007
- 稿件说明：
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KANG Wei, ZHANG Jia-zhong, LIU Yan, et al. Stability and bifurcation of symmetrical rotor in self-acting gas journal bearings[J]. 2007, 22(9).
DOI：

KANG Wei, ZHANG Jia-zhong, LIU Yan, et al. Stability and bifurcation of symmetrical rotor in self-acting gas journal bearings[J]. 2007, 22(9). DOI：

摘要

基于非线性动力学理论

研究了普通圆柱型径向气体动压轴承支承的转子动力系统的运动稳定性和分岔.建立了气体动压轴承-Jeffcott转子系统的力学模型

并采用有限元方法逼近非定常气体雷诺方程

得到任意时刻的气膜力;数值模拟该非线性动力系统的长期行为

得到了轴颈中心的运动轨迹;并采用轨迹图、相图、分岔图以及功率谱等

研究了系统的非线性行为以及不平衡响应的稳定性.研究结果表明:该方法对气体轴承中存在的气膜涡动问题能够给予合理的解释.

Abstract

Based on the nonlinear dynamics theory

the stability and bifurcation of a symmetrical rotor supported in self-acting gas bearings were studied.A dynamic model of self-acting gas journal bearings and Jeffcott rotor system was established

meanwhile the finite element method was used to approach the time-dependent Reynolds equation

thus obtaining the gas film force.Furthermore

the longterm nonlinear dynamic behaviors of the system were simulated numerically

so the system state trajectory of journal center was acquired.Moreover

the system state trajectory

phase diagram

bifurcation diagram and power spectrum were adopted to analyze the nonlinear behaviors of system and the stability of unbalanced response.The results show that this method could give a deep understanding of whirling instability of the gas film bearings-rotor system.

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Related Author

WEI Feng-ting

LI Ying-hong

ZHANG Pu

QI Xing-ming

PIAO Ying

ZHU Jian-hong

ZHOU Jian-xing

WU Yun

Related Institution

Laboratory of Propulsion System, The Engineering Institute, Airforce Engineering University

School of Aerospace, Tsinghua University

The Engineering Institute, Air Force Engineering University

Institute of Engineering Thermophysics, Chinese Academy of Sciences

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