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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。
In the linear range, the sliding bearing rotor system is installed vertically. The stability limit and the area shape of the bearing system with outer elastic damping support are studied. The analytical expressions of the limit speed and the eddy frequency of the rotor are derived respectively. The results show that the intervention of the outer elastic damping support can make the vertical system reach 3 boundaries and thus form two unstable regions and two stable regions.