摘要
舰载无人机是未来海上作战的关键装备,其弹射动态性能严重影响起飞安全。弹射滑车与舰载机起落架弹射杆相连,在牵制杆突卸弹射滑跑过程中共同组成一个耦合动力学系统。目前,国内外尚缺乏对此耦合系统动力学特性的研究。以由某无人机改造的弹射型为研究对象,建立了包含弹射滑车质量的弹射动力学模型,并开展了拖拽弹射过程的动态响应分析,结果表明:弹射滑车的惯性力会沿着弹射杆传递到前起落架上,拖拽弹射过程中前起落架载荷波动幅度增大,前起落架撑杆、弹射杆以及前轮垂向载荷峰值分别增加了23.4%、21.6%和14.0%;前起落架缓冲器压缩量变化范围扩大了30.4%;前起落架纵向和垂向的载荷振荡频率分别从90.9Hz和5.2Hz降到26.3Hz和4.4Hz。
Carrier-based UAV is a key asset in the future marine warfare,and its catapult dynamic performance plays an es- sential role in takeoff security.The catapult shuttle connects to the landing gear,forming a coupled dynamic system together during the catapult progress.At present,the research on such a coupled dynamic system is rare both at home and abroad. Taking a catapulting type of UAV as the research subject,a catapult dynamic system including shuttle mass has been constructed,and the dynamic response after sudden discharge of the holdback load has been analyzed.Results denote that inertia force of catapult shuttle is exerted on the nose landing gear along the catapult link.The nose landing gear load massively fluctuates during catapult dragging.Vertical load of nose landing gear strut,catapult link and nose wheel increase by 23.4%,21.6%,and 14.0%,respectively.The range of the nose landing gear stroke increases by 30.4%.Moreover,the fluctuation frequency of the longitudinal and vertical loads of the nose landing gear decreases from 90.9Hz and 5.2Hz to 26.3Hz and 4.4Hz.
作者
房兴波
聂宏
张钊
魏小辉
张明
FANG Xingbo;NIE Hong;ZHANG Zhao;WEI Xiaohui;ZHANG Ming(Key Laboratory of Fundamental Science for National Defense-Advanced Design Technology of Flight Vehicle,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China;State Key Laboratory of Mechanics and Oontrcl of Mechanical Structures,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)
出处
《航空学报》
EI
CAS
CSCD
北大核心
2018年第12期193-201,共9页
Acta Aeronautica et Astronautica Sinica
基金
国家自然科学基金(11372129)
机械结构力学及控制国家重点实验室(南京航空航天大学)自主研究课题(MCMS-0217G01)
中央高校基本科研业务费专项资金(NP2017401)~~
关键词
舰载无人机
拖拽弹射
弹射滑车
前起落架
动态响应
carrier-based UAV
tow catapulting
catapult shuttle
nose landing gear
dynamic response
