Multi-body Dynamics Modeling and Catapult-launching Simulation for Carrier-based Aircraft
-
摘要: 考虑航母扰动以航母为参考系,建立了考虑机体弹性以及支柱弹性的舰载机弹射起飞多体动力学模型,将舰载机动力学方程推广到非惯性参考系下;通过增加自由停机和张紧停机过程,构建了弹射起飞全过程的数值模拟能力,并通过算例对建模可靠性进行了验证。算例结果准确模拟了牵制杆拉断后前起落架垂向的不稳定振荡现象、弹射力卸载后前起落架的快速突伸现象,以及起落架离舰效应等物理过程。算例结果表明:借助于起落架的突伸,飞机离舰前的升降舵偏角产生的抬头力矩能有效增加离舰的俯仰角和俯仰速度,提高弹射起飞性能;离舰后升降舵偏转控制律在提高飞机迎角建立速度的同时,还能控制最大飞行迎角,有利于离舰飞行安全;飞机离舰时航母舰艏的垂直速度、俯仰速度以及抛射角对飞机的离舰飞行性能有影响,航母运动会危及舰载机弹射起飞安全,且以纵摇和横摇运动的影响最为显著。Abstract: Regarding the flexibility of airframe and landing-gear strut, and taking the carrier as reference frame, the multi-body dynamics model of carrier-based airframe was established. For the first time, the dynamics equations of carrier-based aircraft were extended to non-inertial reference frame. By increasing the simulation procedure of free parking and tension parking, it had the full-process simulation capacity for catapult launch. The validity of the model was verified by a simulation example. The study on the effects of elevator angle and deck motion indicated that:by the aid of the gear fast extension, the nose-up pitching moment caused by elevator angle before flying off can increase pitch angle and pitch rate greatly at the flying-off time; besides speeding up the construction of angle of attack(AOA), the control law for after flying-off elevator angle also control the maximum AOA during climbing, which is conductive to the safety of catapult launch; through the bow vertical velocity, rate of pitch and projecting angle of carrier, the deck motion have significant influence on the after flying-off flight performance. Deck motion endangers the safety of catapult launch of carrier-based aircraft; among the deck motions, the roll motion and pitch motion are more serious.
-
Key words:
- multi-body dynamics /
- catapult launch /
- non-inertial reference frame /
- deck motion /
- gear fast extension
-
[1] Lucas C B. Catapult criteria for a carrier-based airplane, AD702814[R]. LTV Aerospace Corp Dallas Tex Vought Aeronautics DIV1968 [2] 金长江,洪冠新.舰载机弹射起飞及拦阻着舰动力学问题[J].航空学报,1990,11(12):B534-B542 Jin C J, Hong G X. Dynamic problems of carrier aircraft catapult launching and arrest landing[J]. Acta Aeronautica et Astronautica Sinica, 1990,11(12):B534-B542(in Chinese) [3] 郑本武.舰载飞机弹射起飞性能和影响因素分析[J].飞行力学,1992,10(3):27-33 Zheng B W. The catapulting performance of the carrier based airplane and the parameter study[J]. Flight Dynamics, 1992,10(3):27-33(in Chinese) [4] 严重中,冯家波.舰载飞机弹射起飞自动控制上升的飞行特性[J].飞行力学,1996,14(1):41-47 Yan C Z, Feng J B. Flight characteristics research for a carrier-based airplane in autopilot climb during catapult launch[J]. Flight Dynamics, 1996,14(1):41-47(in Chinese) [5] 朱齐丹,李新飞,喻勇涛.考虑载荷突卸的舰载机弹射起飞动力学分析[J].哈尔滨工程大学学报,2012,33(9):1150-1157 Zhu Q D, Li X F, Yu Y T. Analysis of dynamic characteristics of catapult launch for a carrier-based aircraft with sudden load discharge[J]. Journal of Harbin Engineering University, 2012,33(9):1150-1157(in Chinese) [6] 王大海,苏彬.舰面运动对弹射起飞特性的影响[J].飞行力学,1994,12(1):57-63 Wang D H, Su B. The deck motion effects on the catapult-assisted take-off characteristics of the carrier based airplane[J]. Flight Dynamics, 1994,12(1):57-63(in Chinese) [7] 郭元江,李会杰,申功璋,等.复杂环境下舰载机弹射起飞环境因素建模分析[J].北京航空航天大学学报,2011,37(7):877-881 Guo Y J, Li H J, Shen G Z, et al. Modeling and analyze of the environmental factors of carrier-based aircraft catapult launch in complex environment[J]. Journal of Beijing University of Aeronautics and Astronautics, 2011,37(7):877-881(in Chinese) [8] 胡孟权,白双刚,陈怡然.舰载机弹射起飞六自由度动力学建模与仿真[J].飞行力学,2013,31(2):97-100 Hu M Q, Bai S G, Chen Y R. Modeling and simulation for carrier-based aircraft catapult launch with six degrees of freedom[J]. Flight Dynamics, 2013,31(2):97-100(in Chinese) [9] 郭林亮.舰载机起飞安全性能预测与仿真[D].北京:北京航空航天大学,2007 Guo L L. Safely performance prediction and simulation of carrier airplane takeoff[D]. Beijing:Beijing University of Aeronautics and Astronautics, 2007(in Chinese) [10] 隋成国,许锋,聂宏.舰载机弹射起飞动力学虚拟试验研究[J].中国机械工程,2013,24(4):522-527 Sui C G, Xu F, Nie H. Research on dynamics during catapult takeoff of carrier-based aircraft[J]. China Mechanical Engineering, 2013,24(4):522-527(in Chinese) [11] 蒋维清.船舶原理[M].北京:人民交通出版社,1979:80-82 Jiang W Q. Principle of ship[M]. Beijing:China Communications Press, 1979:80-82(in Chinese) [12] 王钱生.舰载机总体设计主要关键技术概述[J].飞机设计,2005,(2):6-10 Wang Q S. Critical technologies in carrier-based aircraft design and development[J]. Aircraft Design, 2005,(2):6-10(in Chinese)
点击查看大图
计量
- 文章访问数: 169
- HTML全文浏览量: 37
- PDF下载量: 5
- 被引次数: 0