Numerical Simulation of Eccentric Hemispherical JPC Underwater Formation and Penetration

LIANG Anqi; LIU Xingyu; FENG Yuheng; YIN Jianping; YI Jianya; ZHANG Xuepeng

doi:10.19554/j.cnki.1001-3563.2025.23.031

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Packaging Engineering ›› 2025, Vol. 46 ›› Issue (23) : 296-304. DOI: 10.19554/j.cnki.1001-3563.2025.23.031

Equipment Protection

Numerical Simulation of Eccentric Hemispherical JPC Underwater Formation and Penetration

LIANG Anqi, LIU Xingyu, FENG Yuheng, YIN Jianping, YI Jianya, ZHANG Xuepeng^*

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Abstract

The work aims to investigate the underwater formation and damage effectiveness of eccentric hemispherical JPC warheads to enhance the penetration capability of shaped-charge warheads against water-containing composite structures. Using numerical simulation, the influences of liner wall thickness and eccentricity increment on the underwater formation of the JPC and on the damage inflicted to a double-layer water-interspaced target were analyzed. The results showed that when the liner wall thickness increased within the 3.5-5.0 mm range, the initial velocity of the JPC upon water entry decreased by 17.19%, but the increased mass significantly improved its velocity retention by 24.14%. Both the hole diameter and deflection deformation of the double-layer water-interspaced target increased continuously, with more significant enhancement in damage to the front plate. The apertures of the front and rear plates increased by 32.9% and 36.3%, respectively, and the deflections increased by 15.6% and 26.5%, respectively. As the eccentricity increment increased from 0 mm to 1.2 mm, the initial velocity of the JPC improved by 14.99%, the hole diameter on the front plate increased by 68.69%, and the deflection increased by 88.4%, whereas the hole diameter on the rear plate decreased by 41.15%, and its deflection showed a trend of first increasing and then decreasing. Considering the JPC's velocity retention, morphological integrity, and post-penetration damage effectiveness, the optimal parameter combination is determined as a liner wall thickness δ=4.5 mm and an eccentricity increment b=0.9 mm. This study provides reference data for the optimal design of underwater shaped-charge warheads.

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double-layer water-interspaced target / underwater explosion / eccentric hemispherical JPC / numerical simulation / damage effect

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LIANG Anqi, LIU Xingyu, FENG Yuheng, YIN Jianping, YI Jianya, ZHANG Xuepeng. Numerical Simulation of Eccentric Hemispherical JPC Underwater Formation and Penetration[J]. Packaging Engineering. 2025, 46(23): 296-304 https://doi.org/10.19554/j.cnki.1001-3563.2025.23.031

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