On the analysis of passive vibration mitigation of nose landing gears

摘要

Shimmy is the self-excited rotational-lateral oscillation encountered in some wheeled structures. The challenge of nose landing gear shimmy vibrations is largely addressed through adding passive shimmy suppression devices to the gear, known as shimmy dampers. Despite the wide treatment of shimmy modeling in the literature little is known about shimmy dampers' performance. In this work we present a novel nose landing gear model including a two-piece strut, with a generic shimmy damper added in between as it is the case in the physical system. Using linear stability analysis, we identify the stability trends of the coupled system.