The Effects of Fuselage Stiffness Asymmetry in the Post-critical Dynamic Behavior of Helicopters

Abstract

International audienceThe present paper contributes to a better understanding about the ground resonance phenomenon in helicopters. A detailed study is presented on the post-critical dynamic analysis of the aircraft behavior at the unstable region. In addition to periodic solutions, the dynamic system may exhibits quasi-periodic and chaotic response depending on the fuselage asymmetry level