桨叶频率 propeller blade frequency
傅立叶频谱 fft spectrum ; spectrum Fourier
傅里叶频谱 Fourier spectrum ; fourier frequency
桨叶频率效应 blade frequency effect
桨叶频率压力 blade frequency pressure
傅里叶频率 Fourier frequency
傅里叶频谱能量比 Fourier spectrum energy ratio
分段傅里叶频谱 piecewise Fourier spectrum
傅里叶频谱仪 Fourier spectrometer
并且这些低频线谱基本上都是转子轴频和叶频的谐波分量。
These low frequency spectrum lines are basically the harmonics of the rotor shaft frequency and the blade-passing frequency.
不对称叶栅非谐设计虽然会引起与转速同频的较大幅值激振力成分，但从整体考虑可有效降低叶片振动应力。
Though asymmetry stator mistuned may result in bigger amplitude aerodynamic force with the same frequency as rotational speed, it could reduce effectively the aerodynamic force of blade as a whole.
认为错频对振动应力的影响正比于其对振动位移（振幅）的影响，可以从系统最大位移的角度来评估叶盘转子失效的风险。
The relations between vibration stress and vibration displacement are direct ratio, so the venture of bladed-disk assemblies invalidation can be evaluated according tot…
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