Numerical simulation and experimental study on the underwater penetration performance of a jetting projectile charge

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Journal of Vibration and Shock ›› 2025, Vol. 44 ›› Issue (6) : 121-129.

SHOCK AND EXPLOSION

Numerical simulation and experimental study on the underwater penetration performance of a jetting projectile charge

ZHANG Xuemei1,2，XIE Xingbo1，ZHONG Mingshou*1，GU Wenbin1，SHEN Chaohu3

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Abstract

In order to improve the accuracy of shaped charge warhead striking underwater targets from air, a phased progressive numerical calculation model for the whole process of rod jet forming from air to underwater penetration of jet into target plate was established. The calculation model was verified by static penetration test, which improved the accuracy of the calculation model, and the error was within 5 %. In the experiment, the velocity of the shaped charge jet before entering the water, after entering the water and before the target is measured by using the on-off velocity measurement network target. The minimum error rate is 0.39 % and the average error rate is 4.16 %. Through the study, it is found that the velocity of the rod jet before and after entering the water decreases linearly, and the velocity before the target increases linearly. The penetration depth of rod jet in water increases first and then decreases with the increase of air explosion height. The optimum explosion height of shaped charge in water is 4.89 times the charge diameter, and the maximum penetration depth in water is 1.3 times the charge diameter. It provides a basis and reference for the research of shaped charge warhead in the air to isolate water and hit underwater targets.

Key words

Arc cone shaped charge / jetting projectile charge / water medium / static penetration test / linear fitting

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ZHANG Xuemei1, 2, XIE Xingbo1, ZHONG Mingshou1, GU Wenbin1, SHEN Chaohu3. Numerical simulation and experimental study on the underwater penetration performance of a jetting projectile charge[J]. Journal of Vibration and Shock, 2025, 44(6): 121-129

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