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Journal of Projectiles, Rockets, Missiles and Guidance >

2023 , Vol. 43 >Issue 6: 19 - 28

DOI: https://doi.org/10.15892/j.cnki.djzdxb.2023.06.004

Numerical Simulation of MEFP for Axial Combined Charge Structures with Double Layer Liners

  • XIN Guanghua 1, 2 ,
  • YANG Baoliang 3 ,
  • JING Tong 3 ,
  • ZHAO Taiyong 2 ,
  • WANG Weizhan 2 ,
  • YI Rongcheng 4 ,
  • WANG Zhuoshuo 1, 2 ,
  • ZHOU Tao 1, 2
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  • 1 School of Mechanical and Electrical Engineering, North University of China, Taiyuan 030051,Shanxi,China
  • 2 National Defense Key Laboratory of Underground Target Damage Technology, North University of China, Taiyuan 030051,Shanxi,China
  • 3 Xi'an Modern Control Technology Research Institute, Xi'an 710065,Shaanxi,China
  • 4 Chongqing Chang'an Industry (Group) Co., Ltd., Chongqing 401120, China

Received date: 2023-08-29

  Online published: 2024-12-30

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Abstract

To improve the penetration ability of multiple explosively formed projectiles (MEFP) against armored targets, a double-layer shield axial combination charge structure MEFP is proposed. The MEFP adopts a double-layer liner structure with 1 in the center and 8 double-layer liners in the circumferential direction. During the explosion forming process, the central double layer main cover can form 2 EFPs, and the circumferential 8 double layer auxiliary covers can form 16 EFPs, which can cause multi-point and dual penetration damage to the armor. Based on the feasibility of this structure, numerical simulation is conducted on the formation and penetration process of the MEFP using ANSYS/LS-DYNA software. The effects of factors such as charge height, main (auxiliary) curvature ratio, main (auxiliary) wall thickness, and main (auxiliary) front and rear stage wall thickness ratio on its formation process are analyzed in detail. The good formation results are used for penetration simulation on the 45 # steel target plate. The research results indicate that MEFP is well formed with the charge height being 75 mm, the main (auxiliary) curvature ratio being 1.0 (1.3), the main (auxiliary) wall thickness being 4 mm (2.5 mm), and the ratio of the main (auxiliary) front and rear wall thickness being 0.5. After penetrating two layers of 12 mm 45 # steel target plates, MEFP still has a certain aftereffect penetration ability; When the explosion height is greater than 2 m, the formed MEFP has a multi-point damage effect, and as the explosion height increases, the damage drop radius increases. The research and design of the double-layer cover axial combination charge structure MEFP has important reference significance for the terminal sensitive projectile warhead.

Key words： double-layer liners; axial combined charge; MEFP; numerical simulation

Cite this article

XIN Guanghua , YANG Baoliang , JING Tong , ZHAO Taiyong , WANG Weizhan , YI Rongcheng , WANG Zhuoshuo , ZHOU Tao . Numerical Simulation of MEFP for Axial Combined Charge Structures with Double Layer Liners[J]. Journal of Projectiles, Rockets, Missiles and Guidance, 2023 , 43(6) : 19 -28 . DOI: 10.15892/j.cnki.djzdxb.2023.06.004

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