Numerical simulation and experimental study on the damage of water partitioned structure by a shaped charge warhead with a combined charge liner

JIANG Wencan; CHENG Xiangzhen; LIANG Bin; NIE Yuan; LU Yonggang

doi:10.11883/bzycj-2021-0389

Volume 42 Issue 8

Sep. 2022

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DENG Shu-sheng, GENG Ji-hui, TAN Jun-jie. Numerical calculation of blast loads from a bursting pressurized vessel[J]. Explosion And Shock Waves, 2007, 27(1): 1-6. doi: 10.11883/1001-1455(2007)01-0001-06

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JIANG Wencan, CHENG Xiangzhen, LIANG Bin, NIE Yuan, LU Yonggang. Numerical simulation and experimental study on the damage of water partitioned structure by a shaped charge warhead with a combined charge liner[J]. Explosion And Shock Waves, 2022, 42(8): 083303. doi: 10.11883/bzycj-2021-0389

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Numerical simulation and experimental study on the damage of water partitioned structure by a shaped charge warhead with a combined charge liner

doi: 10.11883/bzycj-2021-0389

1.
Institute of General Engineering Research, China Academy of Engineering Physics, Mianyang 621999, Sichuan, China
2.
Unit 32391 of PLA, Guangzhou 510515, Guangdong, China

Received Date: 2021-09-16
Rev Recd Date: 2022-03-28

Available Online: 2022-03-30

Publish Date: 2022-09-09

Abstract

Abstract

In order to study the damage mechanism of the shaped charge warhead with a combined charge liner to the water containing composite structure, the formation and penetration process of the penetrator formed by the combined charge liner were studied based on the arbitrary Lagrangian-Euler (ALE) fluid structure coupling algorithm in the LS-DYNA. The damage of the shaped charge warhead with composite liner to the target was verified by experiments. A hemispherical liner eccentric to the axis was designed at the top of the original eccentric sub-hemispherical liner. The forming process of the penetrator, the response state of the water medium, the dynamic energy loss in the process of penetrating the target and the damage mechanism to the target were analyzed for the warhead with the combined liner. The results show that the design of the sub-hemispherical liner on the top of the eccentric sub-hemispherical liner can form a slender rod-like jet at the front of the penetrator, which can increase the whole length of the penetrator and the velocity of the head penetrator. In the process of the target, the head rod-like penetrators form a cavity to help the subsequent penetrators follow with low resistance. Through the analysis of the damage process to the target, it is found that the first layer of target directly connected with the warhead will be affected by both the high-speed impact of the penetrator and the strong shock wave transmitted by the explosion wave along the water medium. With the increase of the thickness of the water layer, the intensity of the explosion shock wave propagating along the water will be rapidly attenuated, and the effect of the explosion shock wave becomes less obvious to the subsequent target. The experimental verification was carried out by the warhead with composite liner structure. The perforation size of each target was compared and analyzed. The experimental results are in good agreement with the numerical simulation results, and the maximum error is within 15%.
- combined liner shaped charge warhead,
- water partitioned structure,
- eccentric sub-hemispherical liner,
- rod-like jet

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