One way to increase the efficiency of a high-bypass jet engine is to turn the fan into an open rotor, a bit like returning to propellers, but using two rings of stubby counter-rotating blades.
Calculations were conducted of the fanrotor natural frequency, vibration modes and critical speeds.
本文针对风机转子进行了固有频率振型和临界转速计算。
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The article introduces an disintegration accident of the fanrotor which is caused by the defection of the guide ring, and analyzing the reasons and putting forward the improving measures as well.