Study on the formation characteristics of underwater hemispherical shaped charge jet and its penetration performance into concrete

作     者：Chao Cao Jinxiang Wang Lingquan Kong Kui Tang Yujie Xiao Yangchen Gu Ming Yang Jian Wang 

作者机构：National Key Laboratory of Transient PhysicsNanjing University of Science and TechnologyNanjing210094China Naval Research InstituteBeijing 100841China 

出 版 物：《Defence Technology(防务技术)》 (Defence Technology)

年 卷 期：2025年第47卷第5期

页      面：180-196页

核心收录：

学科分类：08[工学] 082603[工学-火炮、自动武器与弹药工程] 0826[工学-兵器科学与技术] 

基　　金：supported by the National Science Foundation of China(Grant Nos.12372361,12102427,12372335 and 12102202) the Fundamental Research Funds for the Central Universities(Grant No.30923010908) Postgraduate Research&Practice Innovation Program of Jiangsu Province(Grant No.KYCX23_0520) 

主　　题：Shaped charge jet Underwater penetration Formation characteristic Concrete failure 

摘      要：Shaped charge has been widely used for penetrating ***,due to the obvious difference between the propagation of shock waves and explosion products in water and air,the theory governing the formation of shaped charge jets in water as well as the underwater penetration effect of concrete need to be *** this paper,we introduced a modified forming theory of an underwater hemispherical shaped charge,and investigated the behavior of jet formation and concrete penetration in both air and water experimentally and *** results show that the modified jet forming theory predicts the jet velocity of the hemispherical liner with an error of less than 10%.The underwater jets exhibit at least 3%faster and 11%longer than those in *** shows different failure modes after penetration in air and *** depth of penetration deepens at least 18.75%after underwater penetration,accompanied by deeper crater with 65%smaller ***,cracks throughout the entire target are formed,whereas cracks exist only near the penetration hole in *** comprehensive study provides guidance for optimizing the structure of shaped charge and improves the understanding of the permeability effect of concrete in water.