Penetration Power of Large Underwater Explosion Height of Shaped Charge to Multi-layer Spacer Target

YANG Shan,WANG Shu-shan,WANG Yun-ze,GUI Qiu-yang, ZENG Jing,ZHENG Can-jie, JIA Xi-yu

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Chinese Journal of Explosives & Propellants ›› 2022, Vol. 45 ›› Issue (2) : 243-248. DOI: 10.14077/j.issn.1007-7812.202111001

Penetration Power of Large Underwater Explosion Height of Shaped Charge to Multi-layer Spacer Target

  • YANG Shan1,WANG Shu-shan1,WANG Yun-ze2,GUI Qiu-yang1, ZENG Jing3,ZHENG Can-jie3, JIA Xi-yu1
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Abstract

In order to study and compare the penetration power of typical shaped charge structure(Jet / JPC / EFP)on multi-layer spacer target under the condition of large underwater explosion height, a shaped charge and a multi-layer spacer target structure are designed, combined with a certain engineering background. Jet, JPC and EFP are formed by conical cover, hemispherical cover and spherical cover respectively. The process of underwater large explosion height penetration is simulated by AUTODYN software. Then, two typical hemispherical masks with variable wall thickness are simulated and compared with those with equal wall thickness. Finally, the underwater explosion test of the gradient wall thinkness shaped charge with thick top and thin edge is carried out. The results show that under the condition of large underwater explosion height, JPC with the same charge structure has greater ability to resist the interference of water medium and spacer target and the mass dissipation compared with Jet with the same charge structure, with higher speed and stronger storage capacity than EFP, so it relatively has the highest penetration ability among these structure. The JPC of the gradual wall thickness hemispherical cover with thick top and thin edge is stretched more evenly than that with equal wall thickness, which can improve the effective mass and kinetic energy of the jet and significantly improve the penetration ability. The subsequent penetration ability of the studied example after penetrating the main target plate can be increased by about 25%.

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explosion mechanics / shaped charge / underwater penetration / multilayer spacer target / Jet/JPC/EFP

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YANG Shan,WANG Shu-shan,WANG Yun-ze,GUI Qiu-yang, ZENG Jing,ZHENG Can-jie, JIA Xi-yu. Penetration Power of Large Underwater Explosion Height of Shaped Charge to Multi-layer Spacer Target. Chinese Journal of Explosives & Propellants. 2022, 45(2): 243-248 https://doi.org/10.14077/j.issn.1007-7812.202111001

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