22nd Congress of International Council of the Aeronautical Sciences, Harrogate, UK, 28 August - 1st September, 2000
Paper ICAS 2000-P5.1

NON-LINEAR GROUND RESONANCE OF A HELICOPTER

Z. Dzygadlo, G. Kowaleczko
Military University of Technology, Warsaw, Poland

Keywords: helicopter, resonance, flight mechanics, landing gear

A method of the ground resonance phenomenon analysis is described. It has been performed for a one-main rotor helicopter on the basis of a complete set of nonlinear differential equations taken from flight mechanics. It has been modified by taking into account forces and moments produced by a landing gear. Some results of numerical calculations for two models of landing gear–ground interactions are shown.

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