Enhancement of axial lethality of warhead
-
摘要: 基于预制破片技术的杀伤战斗部周向破片场威力得到了很好的改善，但战斗部头部轴向破片较少，难以实现对空间域的完全封锁。为了改善杀伤战斗部轴向破片场分布，探索影响轴向预制破片飞散角和速度的影响因素，设计了一种轴向威力增强战斗部，通过改变战斗部头部形状、曲率半径并加装球形预制破片实现轴向威力增强。运用LS-DYNA软件对战斗部爆炸驱动全过程进行数值模拟，通过设置不同的起爆条件得到战斗部结构参数对轴向预制破片初速和飞散角的影响规律。仿真结果表明：预制破片的飞散角及速度与战斗部头部结构参数关系密切，采用圆弧形头部结构可显著提高预制破片的飞散速度和飞散角，使预制破片轴向封锁区域显著增大，大大增强战斗部轴向威力。Abstract: The lethality of the circumferential direction fragment field of the warhead has improved greatly due to the premade fragment technique, but the axial fragments are still too few to block the battle space completely. Aiming to improve the distribution of the axial fragment field of the warhead and explore the factors influencing the velocity and scattering angle of the axial premade fragments, we designed an axial forward enhanced warhead by changing the shape and curvature of its head, and displacing the premade fragment to the head of the warhead to improve its lethality in the axial direction. We simulated the whole explosive driven process using LS-DYNA, the influence of the warhead structure on the velocity, and obtained the scattering angle of the axial premade fragments by setting different initial conditions. The results show that the velocity and the scattering angle of the axial premade fragments were closely related with the warhead structure. In addition, when the arc-shaped head warhead was adopted, the velocity, scattering angle, blocking area, and the lethality of the premade fragments were all significantly ameliorated.
-
Key words:
- premade fragment /
- LS-DYNA /
- warhead /
- scattering angle
-
图 2 平板形头部战斗部破片场形成过程
Figure 2. Formation process of fragment field for flat-shaped head warhead
图 3 弧形头部战斗部R=45 mm破片场形成过程
Figure 3. Formation process of fragment field for arc-shaped head warhead with R=45 mm
图 4 弧形头部战斗部R=90 mm破片场形成过程
Figure 4. Formation process of fragment field for arc-shaped head warhead with R=90 mm
图 5 平板形头部战斗部端点起爆典型位置预制破片飞散参数拟合曲线
Figure 5. Fitting curves of flying parameters for flat-shaped head warhead
图 6 R=90 mm弧形头部战斗部端点起爆时典型位置预制破片飞散参数拟合曲线
Figure 6. Fitting curves of flying parameters for arc-shaped head warhead with R=90 mm
图 7 R=45 mm弧形头部战斗部端点起爆时典型位置预制破片飞散参数拟合曲线
Figure 7. Fitting curves of flying parameters for arc-shaped head warhead with R=45 mm
图 8 不同头部结构战斗部预制破片的打击迹线
Figure 8. Shot-trace of preformed fragment for warhead with different head structures
表 1 8701炸药的材料参数和状态方程参数
Table 1. Parameters of material and equation of state for 8701 explosive
ρ/(g·cm-3) D/(km·s-1) pCJ/GPa A/GPa B/GPa R1 R2 ω E0/MJ 1.787 8.39 34 581.4 6.801 4.10 1.00 0.35 0.009 
下载: 导出CSV
表 2 壳体材料参数
Table 2. Material parameters of shell
ρ/(g·cm-3) E/GPa ν σy/GPa Etan/GPa β εf 7.83 210 0.30 0.5 4.0 0.6 0.3
下载: 导出CSV
表 3 平板形头部战斗部端点起爆典型位置预制破片飞散参数
Table 3. Flying parameters of premade fragment for flat head warhead
破片编号 vz/(m·s-1) v/(m·s-1) θ/(°) A2 1 430 1 530 20.82 B2 1 710 1 750 12.27 C2 1 830 1 880 13.24 D2 1 890 1 530 20.82 E2 1 980 1 990 5.70 F2 2 080 2 090 5.61 G2 2 220 2 220 0
下载: 导出CSV
表 4 弧形头部战斗部端点起爆典型位置预制破片飞散参数
Table 4. Flying parameters of premade fragment for arc-shaped head warhead
破片编号 R=90 mm R=45 mm vz/(m·s-1) v/(m·s-1) θ/(°) vz/(m·s-1) v/(m·s-1) θ/(°) A1 1 383 1 502 22.96 1 160 1 836 50.81 B1 1 760 1 975 26.98 1 197 1 473 35.65 C1 2 176 2 356 22.54 1 576 1 946 35.92 D1 2 355 2 448 15.08 1 728 2 062 33.07 E1 2 395 2 478 14.87 2 104 2 229 19.28 F1 2 426 2 480 11.98 2 192 2 353 21.32 G1 2 608 2 645 9.59 2 492 2 513 7.41 H1 2 595 2 608 5.72 2 572 2 583 5.29 I1 2 710 2 711 0 2 664 2 664 0
下载: 导出CSV
表 5 距起爆点不同距离处不同结构战斗部的预制破片分布
Table 5. Distribution of premade fragments at different positions for warhead with different head structures
战斗部类型 L=3 m L=5 m L=7 m S/m2 N/m-2 S/m2 N/m-2 S/m2 N/m-2 平板形 4.08 64 11.35 23 22.25 12 弧形, R=90 mm 7.35 24 20.35 9 39.87 4 弧形, R=45 mm 42.39 7 118.09 3 231.47 2
下载: 导出CSV
-
[1] 冯顺山, 黄广炎, 董永香.一种聚焦式杀伤战斗部的设计方法[J].弹道学报, 2009, 21(1):24-26. http://mall.cnki.net/magazine/Article/DDXB200901007.htmFENG Shunshan, HUANG Guangyan, DONG Yongxiang. A new design method of fragment focusing warhead[J]. Journal of Ballistics, 2009, 21(1):24-26. http://mall.cnki.net/magazine/Article/DDXB200901007.htm [2] 刘彤, 钱立新, 余春祥.破片聚焦战斗部的动态杀伤威力设计[J].爆炸与冲击, 2005, 25(6):536-540. doi: 10.11883/1001-1455(2005)06-0536-05LIU Tong, QIAN Lixin, YU Chunxiang. A conception of the dynamic lethality for focused fragmentation warhead[J]. Explosion and Shock Waves, 2005, 25(6):536-540. doi: 10.11883/1001-1455(2005)06-0536-05 [3] 魏继锋, 焦清介, 吴成.预制破片战斗部试验数值模拟研究[J].弹箭与制导学报, 2004, 24(3):39-41. http://www.cqvip.com/QK/95775X/201213/42695194.htmlWEI Jifeng, JIAO Qingjie, WU Cheng. Experiment and simulation on premade fragment warhead[J]. Journal of Projectiles, Rockets, Missiles and Guidance, 2004, 24(3):39-41. http://www.cqvip.com/QK/95775X/201213/42695194.html [4] 严翰新, 姜春兰, 李明.不同起爆方式对聚焦战斗部性能影响的数值模拟[J].含能材料, 2009, 17(2):143-146. https://www.wenkuxiazai.com/doc/56d26b523b3567ec102d8aa2.htmlYAN Hanxin, JIANG Chunlan, LI Ming. Numerical simulation of effect of different initiation positions on a certain focusing fragment warhead[J]. Chinese Journal of Energetic Materials, 2009, 17(2):143-146. https://www.wenkuxiazai.com/doc/56d26b523b3567ec102d8aa2.html [5] 邢恩峰, 钱建平, 赵国志, 等.炸药驱动预制破片轴向抛掷速度规律研究[J].火炸药学报, 2007, 30(3):30-33.XING Enfeng, QIAN Jianping, ZHAO Guozhi, et al. Study on rule of the axial speeds of projection fragments drived by explosive[J]. Chinese Journal of Explosive and Propellants, 2007, 30(3):30-33. [6] 郭子云, 赵太勇, 陈智刚.战斗部端面预制破片威力性能影响的数值仿真[J].计算机仿真, 2015, 32(3):33-37. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=jsjfz201503008GUO Ziyun, ZHAO Taiyong, CHEN Zhigang. Numerical simulation of lethality influence of warhead end premade fragment[J]. Chinese Journal of Computer Simulation, 2015, 32(3):33-37. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=jsjfz201503008 [7] 刘洪峰, 郭光全, 卢士伟, 等.战斗部轴向预制破片威力性能仿真与试验研究[J].中北大学学报, 2015, 36(增刊1):11-14. http://cdmd.cnki.com.cn/Article/CDMD-10288-2006182288.htmLIU Hongfeng, GUO Guangquan, LU Shiwei, et al. Numerical simulation and test research of the warhead axial premade fragment power performance[J]. Journal of North University of China, 2015, 36(Suppl 1):11-14. http://cdmd.cnki.com.cn/Article/CDMD-10288-2006182288.htm [8] 张世林. 轴向预破片战斗部破片飞散特性影响因素分析[D]. 太原: 中北大学, 2012. http://www.wanfangdata.com.cn/details/detail.do?_type=degree&id=D316474 [9] 时党勇, 李裕春, 张胜民.基于ANSYS/LS-DYNA 8.1进行显示动力分析[M].北京:清华大学出版社, 2005. -
点击查看大图
计量
- 文章访问数: 5634
- HTML全文浏览量: 2189
- PDF下载量: 214
- 被引次数: 0