Research on the Formation and Penetration Efficiency of a Shaped Liner with Multiple Fins EFP

WANG Qibo; YIN Likui; CHEN Zhigang; LIU Guan; LI Bo; LIU Yang; WEI Lijin; TIAN Shilei

doi:10.15892/j.cnki.djzdxb.2023.06.005

Journal of Projectiles, Rockets, Missiles and Guidance >

2023 , Vol. 43 >Issue 6: 29 - 36

DOI: https://doi.org/10.15892/j.cnki.djzdxb.2023.06.005

Research on the Formation and Penetration Efficiency of a Shaped Liner with Multiple Fins EFP

WANG Qibo ¹^,² ,
YIN Likui ² ,
CHEN Zhigang ² ,
LIU Guan ³ ,
LI Bo ⁴ ,
LIU Yang ⁵ ,
WEI Lijin ⁶ ,
TIAN Shilei ⁷

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¹ School of Mechatronics Engineering,North University of China,Taiyuan 030051,Shanxi, China
² Institute of Intelligent Weapons,North University of China,Taiyuan 030051,Shanxi, China
³ Xi'an Institute of Electromechanical Information Technology,Xi'an 710065,Shaanxi, China
⁴ Test and Measuring Academy of China Ordnance Industries,Huayin 714200,Shaanxi, China
⁵ North Information Control Research Academy Group Co., Ltd.,Nanjing 211153,Jiangsu, China
⁶ Jinxi Industries Group Co., Ltd.,Taiyuan 030027,Shanxi, China
⁷ Hebei Second Machinery Industry Co., Ltd.,Shijiazhuang 050031,Hebei, China

Received date: 2023-08-18

Online published: 2024-12-30

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Abstract

In order to obtain explosively formed projectiles (EFP) with good aerodynamic shape and damage effects, based on the forming theory of EFP, a shaped charge cover that can form multi fins EFP is proposed. The influence of its structural parameters on the EFP forming form, power characteristics, and aerodynamic characteristics is studied through the control variable method. The simulation results show that the shaped cover can reliably form the fins EFP. For the formation of fins wing EFP, the radius ratio affects the transformation of projectile shape; The thickness ratio affects the formation position and size of the tail wing; The arc radius ratio affects the position of the fins tip. Through the analysis of the degree of influence of factors, it can be concluded that for the power characteristics of the projectile, the thickness ratio is the main influencing factor; For the aerodynamic characteristics of projectiles, the arc radius ratio is the main influencing factor. Compared with the penetration results of the target plate, the diameter of the irregular penetrator on the target plate is increased by 19.24%, which can generate more fragments behind the target. The research conclusion can provide a reference basis for the design of the fins EFP.

Key words： fins wing; EFP; structural parameters of liner; behind-armor debris

Cite this article

WANG Qibo , YIN Likui , CHEN Zhigang , LIU Guan , LI Bo , LIU Yang , WEI Lijin , TIAN Shilei . Research on the Formation and Penetration Efficiency of a Shaped Liner with Multiple Fins EFP[J]. Journal of Projectiles, Rockets, Missiles and Guidance, 2023 , 43(6) : 29 -36 . DOI: 10.15892/j.cnki.djzdxb.2023.06.005

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