Papers Published

  1. Tang, D. M. and Dowell, Earl H., EFFECTS OF NONLINEAR DAMPING IN LANDING GEAR ON HELICOPTER LIMIT CYCLE RESPONSE IN GROUND RESONANCE., Journal of the American Helicopter Society, vol. 32 no. 1 (1987), pp. 45 - 53 .
    (last updated on 2007/04/10)

    Abstract:
    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 configurations selected to provide physical understanding of the dynamic phenomena involved.

    Keywords:
    VIBRATIONS - Damping;AIRCRAFT LANDING GEAR - Design;