计及弹射滑车质量的某舰载无人机弹射动态响应分析

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90.9 Hz和5.2 Hz降到26.3 Hz和4.4 Hz。

Dynamic response analysis on carrier-based UAV considering catapult shuttle mass

Carrier-based UAV is a key asset in the future marine warfare, and its catapult dynamic performance plays an essential 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 90.9 Hz and 5.2 Hz to 26.3 Hz and 4.4 Hz.