Detonation driving rules for cylindrical casings under asymmetrical multipoint initiations

作     者：Yuan Li Xiaogang Li Yuquan Wen Tao Suo Yuan Li;Xiaogang Li;Yuquan Wen;Tao Suo

作者机构：Institute of Extreme Mechanics and School of AeronauticsNorthwestern Polytechnical UniversityXi'an710072China State Key Laboratory of Explosion Science and TechnologyBeijing Institute of TechnologyBeijing100081China 

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

年 卷 期：2023年第23卷第5期

页      面：35-49页

核心收录：

学科分类：08[工学] 0826[工学-兵器科学与技术] 082603[工学-火炮、自动武器与弹药工程] 0714[理学-统计学（可授理学、经济学学位）] 0701[理学-数学] 0702[理学-物理学] 

基　　金：funded by the National Natural Science Foundation of China [Grant No. 12002178] opening project of the State Key Laboratory of Explosion Science and Technology (Beijing Institute of Technology) [Grant No. KFJJ22-17M] the Fundamental Research Funds for Central Universities 

主　　题：Multipoint initiation Fragment shape Velocity distribution X-ray photography 

摘      要：The detonation wave-aiming warhead can effectively enhance the lethality efficiency. In the past, rules for casing rupture and velocity distribution under asymmetrical initiations were not adequately investigated. In this study, X-ray photography and numerical modelling are used to examine the casing expansions under centre point, asymmetrical one-point, and asymmetrical two-point(with central angles of 45° and 90°) initiations. The results indicate that early casing ruptures are caused by local high pressures, induced by the initiation, detonation wave interaction, and Mach wave onset. The fragment shapes are controlled by the impact angle of the detonation wave. The fragment velocity distributions differ under different initiation types, and the end rarefaction waves can affect the velocity distribution.This study can serve as a reference for the design and optimization of high-efficiency warheads.