外弹性阻尼支承对滑动轴承转子系统稳定性区域形态的影响

The Effect of External Elastic Damping Support on the Regional Pattern of the Stability for an Oil Film Bearing-Rotor System

在线性范围内对立式安装滑动轴承转子系统，在有外弹性阻尼支承作用时的稳定性界限和区域形态进行了研究，并分别导出了转子的界限转速及涡动频率的解析表达式。结果表明，外弹性阻尼支承的介入可使立式系统出现3个界限转达，从而形成两个失稳区和两个稳定区。

On the basis of linear assumption, thestudy on the threshold and regional pattern of stabilityfor a vertical oil film bearing-rotor system with externalelastic damping support is conducted. The analytical expressions of the threshold speed and whirling frequencyof rotor are obtained. The results show that the introduction of external elastic damping support may producethree threshold speeds for the vertical system, evolvingtwo unstable regions and two stable ones as well.