Abstract:Helicopter vibration reduction frequently requires detuning airframe natural frequencies from well-defined frequencies of excitation. If airframe detuning proves impractical, vibration reduction is generally achieved by use of vibration control devices. The most common vibration control device is the fixed or variable-tuned vibration absorber. For either effective detuning or efficient absorber design, accurate information is required with respect to airframe natural frequencies and mode shapes. Due to complex… Show more
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