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Home / Journal of the American Helicopter Society, Volume 32, Number 1

Effects of Nonlinear Damping in Landing Gear on Helicopter Limit Cycle Response in Ground Resonance

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Authors: Tang, D. M.; Dowell, Earl H.

Source: Journal of the American Helicopter Society, Volume 32, Number 1, 1 January 1987, pp. 45-53(9)

Publisher: Vertical Flight Society

DOI: https://doi.org/10.4050/JAHS.32.1.45

An approximate theoretical method is presented which predicts the limit cycle behavior of a simplified helicopter model in ground resonance, considering the effects of one or two nonlinear dampers in the landing gear. The relationship between lagging motion of the blades and fuselage motion during ground resonance is discussed. The theoretical predictions agree reasonably well with experimental results obtained for three model contigurations selected to provide physical understanding of the dynamic phenomena involved.

Document Type: Research Article

Affiliations: Nanjing Aeronautical Institute, Nanjing, Peoples Republic of China

Publication date: 01 January 1987

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