舰载机弹射起飞安全性的影响因素分析  

Influence factor analysis of catapult launch safety for carrier-based aircraft

作　　者：董阿鹏[1] 李书[1] 朱文国 吴伟潇 DONG Apeng;LI Shu;ZHU Wenguo;WU Weixiao(School of Aeronautic Science and Engineering,B eijing University of Aeronautics and Astronautics,Beijing 100083,China)

机构地区：[1]北京航空航天大学航空科学与工程学院,北京100083

出　　处：《北京航空航天大学学报》2018年第11期2396-2404,共9页Journal of Beijing University of Aeronautics and Astronautics

基　　金：国家"863"计划(2012AA112201)~~

摘　　要：为了全面考察舰载机(CBA)弹射起飞系统的安全性能,在绝对坐标系下,利用自然坐标法,建立了弹射起飞过程的多体耦合动力学模型,结合舰载机弹射仿真曲线,从舰载机加速度和飞行轨迹两方面研究了不同参数对弹射安全的影响规律。仿真结果表明:在弹射滑跑阶段,弹射力对水平加速度影响较大,在自由飞行阶段,发动机推力对水平加速度影响较大,而起飞重量在整个弹射过程对加速度均有明显影响;定力栓临界值的增大对加速度、飞行轨迹影响不大,但需要考虑其带来的结构振动和时延效应;较长的剩余甲板可以增加离舰升力,从而有效减小离舰下沉量;舰船纵摇可引起飞行轨迹大幅下沉,应避免舰船纵摇位移最大的时刻离舰起飞,其中舰船运动引起牵制杆的提前释放也应是控制弹射时间的考虑因素之一;弹射起飞安全性设计是一个多变量寻优过程,单一要素的优化难以得到满意结果,需综合分析各要素的影响。To comprehensively investigate the safety performance of carrier-based aircraft (CBA)catapult takeoff process,a multi-body coupled dynamics model was established in absolute coordinate system with the natural coordinate method:Based on the simulation curves of catapult launch,the influence of different parameters on catapult safety is studied from two aspects:the CBA acceleration and the flight trajectory.The simulation results show that the catapult force and the engine thrust are the main reasons that affect the horizontal acceleration during taxiing process and airborne flight process respectively,while the takeoff weight imposes great effects during the entire catapult process;although the enhancement of the fixed-load plug has little effect on the acceleration and flight trajectory,the influence on structure vibration and time delay cannot be ignored; longer deck edge distance can increase the departure lift and reduce the trajectory descent effectively;carrier pitch can cause great sink,so it is important to avoid the departure when carrier pitch is at the maximum,and meanwhile the early release of the holdback bar caused by the ship motion should be considered for controlling the catapult time;catapult launch safety design is a multivariate optimization process and needs comprehensive analysis of various factors rather than focusing on single factor.

关 键 词：舰载机(CBA) 弹射起飞 多体动力学 分析动力学 自然坐标法 飞行安全 

分 类 号：V221.6[航空宇航科学与技术—飞行器设计] O313.7[理学—一般力学与力学基础]