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Abstract Aircraft ground handling is severely affected by shimmy, significantly reducing the landing gear's lifespan and increasing accident rates. To mitigate landing gear shimmy, this study employs a Nonlinear Energy Sink (NES).We focus on the landing gear of a light aircraft, a dynamic model incorporating an NES device is developed. First, we analyzes the NES device's impact on the stability region and amplitude of landing gear shimmy, demonstrating its effectiveness in mitigation. Beside, the study examines how parameters such as nonlinear stiffness, linear stiffness, mass, damping coefficient, and vertical distance from the NES device to the landing gear's S-axis influence the damping effect. Furthermore, under specified optimization goals, We had selected suitable parameter ranges and a genetic algorithm is employed for global optimization. Finally, the reliability of the optimized results is confirmed through time-domain analysis. This research indicates that NES devices can enhance landing gear anti-shimmy performance, it’s offer significant practical value.
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Received: 06 May 2024
Published: 27 December 2024
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2024, Vol. 45 
