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弹性支承滑动轴承系统的稳定性理论研究(Ⅰ)———非线性失稳振动的计算与分析
引用本文:彭超英,高孔荣.弹性支承滑动轴承系统的稳定性理论研究(Ⅰ)———非线性失稳振动的计算与分析[J].华南理工大学学报(自然科学版),1996(12).
作者姓名:彭超英  高孔荣
作者单位:华南理工大学轻工食品学院
摘    要:研究了弹性支承滑动轴承系统的油膜稳定性理论。在建立包含支承阻尼和转子外阻尼在内的弹性支承滑动轴承系统模型的基础上,用非线性方法计算了该系统的油膜失稳振动,讨论了缩小失稳区的方法和具体措施。结果证明,该系统的失稳区宽度和幅度都是有限的;采用较低的无量纲综合系数和适当的无量纲支承阻尼系数和/或较大的无量纲转子外阻尼系数可以缩小失稳区;合理的支承参数将使失稳振动的幅频曲线变为形态上好象共振曲线一样,这样转子将能迅速地越过失稳区。

关 键 词:弹性支承  滑动轴承  油膜稳定性  失稳振动

RESEARCH ON STABILITY THEORY OF SLIDING BEARING SYSTEM WITH ELASTIC SUPPORT (1) Calculation and Analysis of the Nonlinear Unstable Vibration
Peng Chaoying,Gao Kongrong.RESEARCH ON STABILITY THEORY OF SLIDING BEARING SYSTEM WITH ELASTIC SUPPORT (1) Calculation and Analysis of the Nonlinear Unstable Vibration[J].Journal of South China University of Technology(Natural Science Edition),1996(12).
Authors:Peng Chaoying  Gao Kongrong
Abstract:This paper studies the film stability theory of the sliding bearing system with elastic support. On the basis of establishing the model of the system containing both support damping and rotor external damping, the film unstable vibrations of the system are calculated by the use of nonlinear method, then the methods and the concrete measures of narrowing unstable region are dealt with ,thus proving that the width and the amplitude of the unstable region is limited. The use of lower dimensionless integrated coefficient and moderate dimensionless support damping coefficient and/or higher dimensionless rotor external damping coefficient can decrease the unstable region. A set of resonable support parameters can make the amplitude frequence curve of unstable vibration behave like resonance curve in its form, so that the rotor will be capable of crossing the unstable region quickly.
Keywords:elastic support  sliding bearing  film stability  unstable vibration
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