Abstract:

An analytical model is developed for helicopter rotor/fuselage coupled dynamic stability with interblade nonlinear viscoelastic dampers.Coupled with the calculation of helicopter equilibrium in the flight dynamics,the analytical model considers the factors as blade torsion manipulation,fuselage pose angle and hub longitudinal install angle.Along with the blade viscoelastic damper nonlinear properties, an improved nonlinear VKS model based on complex modulus.

Key words: helicopter , dynamics,  , air , resonance,  , interblade , viscoelastic , damper,  , nonlinear , characteristic,  , parametric , analysis