认为发电机转速达到两倍临界转速附近，轴系发生了油膜振荡。

Thought that the generator rotational speed had achieved nearby two time of critical rotation speeds, the shafting has had the oil film vibration.

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并针对立轴系统各结构参数的改变，得到了分离机立轴系统各结构参数对其临界转速的影响。

Through changing the structural parameters of the principal axis system, we can obtain the effect of each parameter on the critical rotational speed.

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将弹性支承轴系分为转子子系统与支承子系统，假定在交联点处的位移阻抗值，则可由频率方程序确定转子子系统的临界转速。

By assuming impedance values of the coupling points, the critical speeds of the rotor subsystem can be determined from its frequency equation.

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