Dynamic properties of some gimbal and teetering two-blade helicopter rotor heads

dc.contributor.author Croce, A.
dc.contributor.author Possamai, R.
dc.contributor.author Trainelli, L.
dc.date.accessioned 2016-12-16T15:14:31Z
dc.date.available 2016-12-16T15:14:31Z
dc.date.issued 2014
dc.description.abstract The primary aim of the paper is the characterization of the dynamic behaviour of an innovative two-blade main rotor design under cyclic perturbations. The consequent ‘wobbling’ motion, i.e. the 2/rev precession of the hub with respect to the mast, is known as a significant drawback of typical current two-blade rotor realisations, based on a teetering mount, as it induces considerable oscillating loads to the fuselage. As an alternative capable to alleviate this problem, the proposed design is based on a constant-speed gimbal mount. The performance of this solution is contrasted with a pure teetering one, as well as with intermediate architectures retaining only a part of the innovative elements of the new gimbal rotor, in order to appreciate their effects separately. All models are simulated within a high-fidelity finite element multibody framework. The results confirm the superior characteristics of the constant-speed architecture. The study is completed with a sensitivity analysis of the dynamic response of the proposed rotor model with respect to some important design parameters.
dc.identifier.other 37-B-paper
dc.identifier.uri http://hdl.handle.net/20.500.11881/3394
dc.language.iso en
dc.title Dynamic properties of some gimbal and teetering two-blade helicopter rotor heads
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