Analysis of the mass of behind-armor debris generated by RHA subjected to normal penetration of variable cross-section EFP  

作　　者：Boyang Xing Dongjiang Zhang Zhenyan Guo Yunhui Hou Rui Guo Rongzhong Liu Liang Chen Hao Zhou Yongliang Yang Jianhua Luo 

机构地区：[1]School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China [2]Xi'an Modern Control Technology Research Institute, Xi'an 710065, Shanxi, China [3]School of Electronic and Optical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China

出　　处：《Defence Technology（防务技术）》2019年第3期390-397,共8页Defence Technology

基　　金：financially supported by the National Natural Science Foundation of China(Grant No.11372136)

摘　　要：Analyzing the mass of behind-armor debris (BAD) generated by Rolled Homogeneous Armor (RHA) subjected to normal penetration of variable cross-section Explosively Formed Projectile (EFP) is the purpose of this paper. So theoretical analysis, numerical simulation and experimental data are combined to analyze the influence of variable cross-section characteristic on the time history of crater radius. Moreover the relationships between time history of crater radius (as well as mass of BAD) and the thickness of RHA (from 30mm to 70 mm) and the impact velocity of EFP (1650 m/s to 1860 m/s) are also investigated. The results indicate that: 1) being compared to the variable cross-section characteristic is ignored, the theoretical time history of crater radius is in better agreement with the simulation results when the variable cross-section characteristic is considered;2) being compared to the other three conditions of plug, the theoretical mass of BAD is in the best agreement with the simulation results when the shape of plug is frustum of a cone and the angle between generatrix and bottom is 45- and the axial length of mushroom is considered.Analyzing the mass of behind-armor debris(BAD) generated by Rolled Homogeneous Armor(RHA)subjected to normal penetration of variable cross-section Explosively Formed Projectile(EFP) is the purpose of this paper. So theoretical analysis, numerical simulation and experimental data are combined to analyze the influence of variable cross-section characteristic on the time history of crater radius.Moreover the relationships between time history of crater radius(as well as mass of BAD) and the thickness of RHA(from 30 mm to 70 mm) and the impact velocity of EFP(1650 m/s to 1860 m/s) are also investigated. The results indicate that: 1) being compared to the variable cross-section characteristic is ignored, the theoretical time history of crater radius is in better agreement with the simulation results when the variable cross-section characteristic is considered; 2) being compared to the other three conditions of plug, the theoretical mass of BAD is in the best agreement with the simulation results when the shape of plug is frustum of a cone and the angle between generatrix and bottom is 45and the axial length of mushroom is considered.

关 键 词：Explosively formed PROJECTILE Behind-armor DEBRIS Variable CROSS-SECTION characteristic Shape of plug Axial length of MUSHROOM Theoretical model 

分 类 号：TJ[兵器科学与技术]