They are normal (without any fault), unbalance, radial rub, oil whirl and a simultaneous state of unbalance and radial rub. The first condition is normal, and the last four conditions are fault conditions.
本文共模拟转子的5种运行状态,一种为正常状态,另四种为故障状态包括不平衡、碰摩、涡动以及不平衡+碰摩。
参考来源 - 基于数据挖掘与信息融合的故障诊断方法研究·2,447,543篇论文数据，部分数据来源于NoteExpress
因此，这种现象称为“油膜振荡”或“共振涡动。”
This phenomenon is therefore known as "oil whip" or "resonant whirl".
热量涡动输送也表现出与天气尺度波动活动量类似的特征。
The transient eddy heat flux show similar features of activity of synoptic-scale disturbance.
为减小涡动，转子径向采样周期应与转速相适应，不宜过快。
For reducing whirling the radial sampling period must be suitable to the rotor speed not excessively short.
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