文中提出了实验模型的零阻尼设计原则，描述了失速颤振发生的过程。

Designing of BF-1 rotors depends upon the principle that the total damping is equal to zero at the point near the stall flutter boundary.

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看来采用自由无阻尼正规模态可保证变形运动的线动量和角动量为零。

The use of the free undamped normal modes is seen to ensure that the linear and angular momenta of the distortional motion vanish.

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对于不同的传压管径、传压管长度和腔室容积，得到不同阻尼的衰减振荡曲线以及过阻尼时呈单调衰减的回零过程曲线。

Then the different damped oscillation curves and over-damped monotonic decay curves can be obtained for various diameter and length of the pressured tube and various volume of the chamber.

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