Post-critical analysis of ground resonance phenomenon: effect of stator asymmetry

Abstract : In helicopter with hinged rotor, an unstable dynamic phenomenon known as ground resonance may occur, leading to the total destruction of the aircraft. The prediction of the stability boundary has been addressed for various helicopter configurations by using different methods. However, in order to develop control strategies for this phenomenon, the post-critical behavior of the system needs to be known. In this paper, the post-critical behavior of the ground resonance instability is investigated. For this purpose, the behavior of a helicopter with four identical hinged blades is investigated and fuselage asymmetry is taken into account. It is shown that, due to fuselage asymmetry, in addition to periodic solutions the system may exhibit quasiperiodic and chaotic response.
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https://hal.archives-ouvertes.fr/hal-01950781
Contributor : Pierre Naegelen <>
Submitted on : Tuesday, December 11, 2018 - 9:16:53 AM
Last modification on : Friday, October 11, 2019 - 8:22:59 PM

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  • HAL Id : hal-01950781, version 1

Citation

Etienne Gourc, Leonardo Sanches, Guilhem Michon, Valder Steffen. Post-critical analysis of ground resonance phenomenon: effect of stator asymmetry. Nonlinear Dynamics, 2016, 83 (1), pp.201--215. ⟨hal-01950781⟩

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