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在线性范围内对滑动轴承转子系统在转子外阻尼作用下的稳定性区域形态进行了研究,并分别导出了立式和卧式转子系统的界限转速及涡动频率的解析表达式。结果表明,外阻尼可使立式系统在某一界限转速处进入无上限稳定区;而使卧式系统出现了两个界限转速,形成一个失稳区夹于两个稳定区之间的系统稳定性区域形态,最后通过算例对有关推论进行了证明。
In the linear range, the stability of the sliding bearing rotor system under rotor external damping is studied. The analytical expressions of the boundary speed and the eddy frequency of the vertical and horizontal rotor systems are respectively derived. The results show that the external damping can make the vertical system enter the upper limitless stable zone at a certain limit speed, while the horizontal system has two limit speeds, which results in a stable system with the unstable zone sandwiched between two stable zones At the end of the paper, some examples are used to prove the relevant inference.