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- W815677316 abstract "In an effort to understand the vibration mechanisms of helicopters, the following basic studies are considered. A coupled rotor-fuselage vibration analysis including inplane degrees of freedom of both rotor and airframe is performed by matching of rotor and fuselage impedances at the hub. A rigid blade model including hub motion is used to set up the rotor flaplag equations. For the airframe, 9 degrees of freedom and hub offsets are used. The equations are solved by harmonic balance. For a 4-bladed rotor, the coupled responses and hub loads are calculated for various parameters in forward flight. The results show that the addition of inplane degrees of freedom does not significantly affect the vertical vibrations for the cases considered, and that inplane vibrations have similar resonance trends as do flapping vibrations." @default.
- W815677316 created "2016-06-24" @default.
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- W815677316 date "1985-11-01" @default.
- W815677316 modified "2023-09-24" @default.
- W815677316 title "Coupled rotor-body vibrations with inplane degrees of freedom" @default.
- W815677316 hasPublicationYear "1985" @default.
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