On the Perforation Characteristics of Concrete Wall Induced by Annular Jet and Central EFP Combined Warhead

doi:10.3969/j.issn.1000-1093.2021.08.001

Abstract

Abstract: A combined warhead with annular jet and central explosively formed projectile (EFP), which can produce large holes on reinforced concrete wall, is designed to solve the problem of perforating large hole on the wall. To solve the problems of twisting and deflection in forming process of annular jet, the annular liner with variable wall thickness is proposed. The variable wall thickness of annular liner is realized by two eccentric circles, and the changing gradient of wall thickness is determined by eccentricity. The forming processes of annular liner with four different wall thickness gradients were analyzed through numerical simulation, and the numerical simulation of the annular jet and the central EFP combined warhead penetrating into concrete wall was carried out. The annular jet with better density also has a certain angle of expansion. The perforation capability of the combined warhead to the concrete wall was verified through test. The test results show that the combined warhead can produce a through hole with a diameter of more than 2.5 times larger than the diameter of charge caliber on the concrete wall.

Key words: combinedwarhead, annularjet, centralexplosivelyformedprojectile, concretewall, perforationcharacteristics

CLC Number:

REN Siyuan , ZHANG Qingming, ZHANG Xiaowei, TIAN Zhimin. On the Perforation Characteristics of Concrete Wall Induced by Annular Jet and Central EFP Combined Warhead[J]. Acta Armamentarii, 2021, 42(8): 1569-1579.

References 1

[1]

王利侠, 袁宝慧, 孙建, 等.串联侵彻战斗部前级装药设计及试验研究［J］.火炸药学报, 2011, 34(4):52-56.WANG L X, YUAN B H, SUN J, et al. Design and experimental study of precursory charge for tandem warhead［J］. Chinese Journal of Explosives & Propellants, 2011, 34(4): 52-56.(in Chinese)［2］童宗宝，王小春，程剑. 一种M型药型罩形成环形射流的数值模拟研究［J］.兵器装备工程学报，2016, 37(3):143-145.TONG Z B, WANG X C, CHEN J, et al. Study on numerical simulation of M shaped charged liner form annular jet［J］. Journal of Ordnance Equipment Engineering, 2016, 37(3):143-145.（in Chinese）［3］张晋红, 李如江, 刘天生.环形及线形聚能装药侵彻体对长杆式穿甲弹穿甲过程干扰的试验和数值模拟［J］.兵工学报,2018,39(7):1372-1378.ZHANG J H, LI R J, LIU T S. Experimental and numerical simulation of interference of annular and linear shaped charge penetrators on armor-piercing process of long rod armor-piercing projectiles［J］. Acta Armamentarii, 2018, 39(7):1372-1378.(in Chinese)［4］郭俊, 张晓伟, 张庆明. 大口径开孔聚能装药结构的设计方法研究［J］. 兵工学报, 2014, 35(增刊2):40-45.GUO J, ZHANG X W, ZHANG Q M. Design method for shaped charge structure with large-radius perforation ［J］. Acta Armamentarii, 2014, 35(S2): 40-45.(in Chinese)［5］王成, 恽寿榕, 黄风雷. W型聚能装药射流形成及侵彻的实验和数值仿真研究［J］. 兵工学报, 2003, 24(4):451-454.WANG C, YUN S R, HUANG F L. An experimental study and numerical simulation of annular jet formation and penetration ［J］. Acta Armamentarii, 2003, 24(4):451-454.(in Chinese)［6］段嘉庆. 新型装药结构侵彻钢筋混凝土目标数值仿真［D］.太原：中北大学, 2013.DUAN J Q. Numerical simulation of the penetration of reinforced concrete targets by new charge structure［D］. Taiyuan: North University of China, 2013.(in Chinese)［7］吴成, 曾艳春, 张向荣, 等. 环型聚能药型罩的设计新方法与实验［J］. 北京理工大学学报, 2007, 27(4):291-294.WU C, ZENG Y C, ZHANG X R, et al. Investigation and design on the penetration effect of annular-linear shaped charge ［J］. Transactions of Beijing Institute of Technology, 2007, 27(4): 291-294.(in Chinese)［8］黄群涛. 环形EFP形成机理研究［D］. 南京：南京理工大学, 2008.HUANG Q T. Formation mechanism of annular EFP［D］. Nanjing: Nanjing University of Science and Technology, 2008.(in Chinese)［9］李鹏飞, 肖川, 王利侠. 环形EFP的形成和侵彻效应［J］. 火炸药学报, 2008, 31(3):6-9.LI P F, XIAO C, WANG L X. Study on annular EFP formation and penetration effect ［J］. Chinese Journal of Explosives & Propellants, 2008, 31(3): 6-9.(in Chinese)［10］ CHICK M C, BUSSELL T J, LAM C P, et al. Development of a cookie-cutter explosively formed projectile［C］∥Proceedings of the 17th International Symposium on Ballistics. Midrand, South Africa: South African Ballistics Organisation, 1998: 160-167.［11］徐文龙, 王成, 徐斌. 新型环形聚能射流形成机理研究［J］. 北京理工大学学报, 2018, 38(6):572-578.XU W L, WANG C, XU B. Investigation of new type annular shaped charge formation mechanism ［J］. Transactions of Beijing Institute of Technology, 2018, 38(6): 572-578.(in Chinese)［12］ XU W L, WANG C, CHEN D P. Formation of a bore-center annular shaped charge and its penetration into steel targets［J］. International Journal of Impact Engineering, 2019, 127:122-134.［13］隋树元, 王树山. 终点效应学［M］．北京:国防工业出版社, 1998.SUI S Y, WANG S S. Terminal effect ［M］. Beijing: National Defense Industry Press, 1998.(in Chinese)［14］ FU L, WANG W L, HUANG X F, et al. Numerical simulation on penetration into double plates of annular jet［J］. Applied Mechanics & Materials, 2013, 457/458:1523-1526.［15］王成, 宁建国, 卢捷. 环形射流形成及侵彻的数值方法研究［J］. 北京大学学报(自然科学版), 2003, 39(3):316-321.WANG C, NING J G, LU J. Study on numerical simulation of the annular jet formation and penetration ［J］. Acta Scientiarum Naturalium Universitatis Pekinensis, 2003, 39(3): 316-321.(in Chinese)［16］吴晗玲, 段卓平, 汪永庆. 杆式射流形成的数值模拟研究［J］. 爆炸与冲击, 2006, 26(4):328-332.WU H L, DUAN Z P, WANG Y Q. Numerical simulation of rod-like jet ［J］. Explosion and Shock Waves, 2006, 26(4): 328-332.(in Chinese)［17］陆志毅, 刘宏杰, 李大超,等. 环形聚能战斗部壳体与装药匹配性研究［J］. 中国设备工程, 2020, 443(7): 95-96.LU Z Y, LIU H J, LI D C, et al. Study on matching between shell and charge of annular shaped charge warhead ［J］. China Plant Engineering, 2020, 443(7): 95-96.(in Chinese)