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阻力伞-灵巧子弹系统气动及稳定性研究
引用本文:李尧尧,姜春兰.阻力伞-灵巧子弹系统气动及稳定性研究[J].北京理工大学学报,2014,34(8):785-789.
作者姓名:李尧尧  姜春兰
作者单位:北京理工大学机电学院,北京100081;北京理工大学机电学院,北京100081
摘    要:为研究阻力伞-灵巧子弹系统空气动力学特性及气动特性对系统飞行动稳定性的影响,应用系统动力学和计算流体力学对非轴对称弹体外形进行了对比仿真,分析了子弹和阻力伞气动流场,与风洞试验进行了对比;为优化伞-弹系统气动特性,提高打击效率提供了数据支持,同时建立伞-弹弹道模型进行系统弹道仿真,归纳了气动数据、开伞时间对系统动稳定性影响规律.结果表明非对称外形对子弹气动特性影响不大,系统气动特性稳定,合适的开伞时间和气动参数对动稳定性有一定影响. 

关 键 词:阻力伞-灵巧子弹系统  计算流体动力学  稳定性  数字仿真
收稿时间:3/6/2013 12:00:00 AM

Analysis on the Aerodynamic Characteristics and the Stability of the Parachute-Bomb System
LI Yao-yao and JIANG Chun-lan.Analysis on the Aerodynamic Characteristics and the Stability of the Parachute-Bomb System[J].Journal of Beijing Institute of Technology(Natural Science Edition),2014,34(8):785-789.
Authors:LI Yao-yao and JIANG Chun-lan
Institution:School of Mechatronical Engineering, Beijing Institute of Technology, Beijing 100081, China
Abstract:In order to analyze the influence of aerodynamic characteristics of parachute-bomb system and its pneumatic characteristics on the dynamic stability of the system, the shape of non-symmetry bomb body was simulated contrastively in system dynamics and computational fluid dynamics. The flow field of the parachute and the bomb were simulated separately comparing with the test in wind tunnel. The simulate result provided datum support for optimizing aerodynamic characteristics of parachute-bomb system and advancing system's shooting efficiency. Through the ballistic trajectory simulation, the influence of the dynamic datum and opening umbrella time on the dynamic stability of the system was concluded. The result of this paper can indicate that the infection of the non-symmetry shape on the aerodynamic characteristics of bomb is less, the aerodynamic characteristics of system are stable, but the dynamic datum and opening umbrella time influence the dynamic stability definitely.
Keywords:parachute-bomb system  computational fluid dynamics  stability  numerical simulation
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