飞机起落架结构振动的非线性动力学研究现状及展望

摘要

飞机起落架是飞机地面停放、跑道滑跑、降落的过程中用于承受飞机重量、吸收撞击能量的一个关键受力部件,是为飞机提供滑行操纵和制动力的起飞着陆装置.飞机在路面滑跑时,由于跑道的不平整导致机身振动,飞机在着陆时,机身承受了来自地面的巨大冲击力,这些振动都会严重影响飞机的稳定性和安全性,降低飞行员和乘客的舒适度,甚至导致飞行事故.对飞机起落架振动的非线性动力学研究现状进行了总结,包括飞机起落架结构振动的非线性动力学行为机理、起落架冲击和垂向振动及控制、起落架摆振及控制等方面.对起落架结构振动的非线性动力学、主动及半主动控制的研究前景进行了展望.%The aircraft landing gear system is an important load bearing component to support aircraft weight and absorb impacting energy when the aircraft parking on the ground,taxiing on the runway and landing on the ground.It is also a takeoff and landing device that provides taxiing and braking manipulation.The vibration of the aircraft may affect the stability and safety of the aircraft,reduce the comfort of pilots and passengers,even lead to flight accidents.The aircraft vibration mainly comes from the following two aspects.The irregularities of runway may lead to the vibration of the fuselage when the aircraft is taxiing on the runway.The impact from the ground may lead to vibration of the fuselage when the aircraft is landing on the ground.The nonlinear dynamics of aircraft landing gear vibrating system is summarized,including the nonlinear dynamic behavior mechanism of aircraft landing structure vibration,vibration and control of landing gear impact and vertical vibration,vibration and control of landing gear shimmy.The study and progress of nonlinear dynamics,active and semi-active control of landing gear vibration system are reviewed and the prospect of landing gear vibrating system is also discussed.