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- W49257614 abstract "Centrifugal pendulum vibration absorbers are widely used as the vibration suppression devise for helicopters. The vibration characteristics of this absorber has been investigated by applying the linear theory on anti-resonance. However, the nonlinear characteristics appear when the pendulum swings with large amplitude. The authors studied vibration suppression characteristics of pendulum absorbers considering nonlinear characteristics of pendulums. In the first report, we investigated a two-degree-of-freedom system composed of a rigid rotor blade and a pendulum. In this system, the blade was excited by a harmonic deflection motion of the shaft. In the second report, we investigated a three-degree-of-freedom system composed of a fuselage, a rigid blade and a pendulum. In this paper, the model has three degrees of freedom and is composed of a blade, a pendulum and a rotor mount. The blade is flexible and only the first mode is considered. An aerodynamic excitation force applies to the blade. The vibration suppression characteristics of this system are investigated theoretically and experimentally." @default.
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- W49257614 date "2010-01-01" @default.
- W49257614 modified "2023-09-25" @default.
- W49257614 title "Vibration Suppression of a Helicopter by Pendulum Absorbers : First Elastic Mode of Blades(<Special Issue>Dynamics & Design Conference 2009)" @default.
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- W49257614 doi "https://doi.org/10.1299/kikaic.76.1148" @default.
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