椭圆形截面杀伤战斗部破片初速分布特性研究  

Study on distribution characteristics of initial velocity of elliptic killing warhead fragment

作　　者：姜斌 沈波 薛再清[1] 李国杰[1] 乔良[1] 辛春亮[1] JIANG Bin;SHEN Bo;XUE Zaiqing;LI Guojie;QIAO Liang;XIN Chunliang(Beijing Institute of Space Long March Vehicle, Beijing 100076, China)

机构地区：[1]北京航天长征飞行器研究所,北京100076

出　　处：《兵器装备工程学报》2022年第3期149-155,共7页Journal of Ordnance Equipment Engineering

摘　　要：为探究椭圆形截面杀伤战斗部破片初速度周向分布规律,采用LS-DYNA数值仿真分析了椭圆形的扁率对破片加速过程的影响,并基于一维等熵流体理论,对椭圆形截面长轴和短轴方向破片的驱动过程进行分析。研究结果表明,理论计算结果与数值仿真结果一致性较好。椭圆形截面战斗部周向破片不均匀分布,战斗部短轴方向的破片速度和密度均大于长轴方向,随着扁率的增大,这种趋势愈发明显。长轴方向破片主要受爆轰波初始冲击加载过程的影响,并且其爆轰波阵面强度会被来自侧向的稀疏波削弱;而短轴方向破片除受到爆轰波初始加载作用外,还受到侧破片反射回来的压缩波的作用,为其速度增益。In order to explore the circumfluence distribution of the initial velocity of fragments in an elliptic killing warhead,LS-DYNA numerical simulation was used to analyze the influence of the ellipse flattening on the fragment acceleration process.And based on one-dimensional isentropic fluid theory,the driving process of the fragments in the long and short axis directions of the elliptic section was analyzed.The results show that the theoretical calculation results are in good agreement with the numerical simulation results.The circumferential fragment distribution of the ellipse warhead is not uniform,the fragment velocity and density in the short axis direction of the warhead are greater than that in the long axis direction,and with the increase of the ellipse flattening,this trend becomes more and more obvious.The loading process of fragments in the long axis direction is mainly affected by the initial impact of the detonation wave,and the strength of the detonation wave front is weakened by the lateral sparse wave.While the fragments in the short axis direction are not only subjected to the initial loading of the detonation wave,but also subjected to the compression waves reflected back from opposite fragments for the velocity gain.

关 键 词：杀伤战斗部 椭圆形截面 数值计算 一维等熵流体 

分 类 号：TJ410.33[兵器科学与技术—火炮、自动武器与弹药工程]