Effect of Shell on Short-range Characteristics of Underwater Blast of Explosive

被引：0
|
作者：
Li B.-B. [1 ]
Wang H. [1 ]
Shen F. [1 ]
Yuan B.-H. [1 ]
机构：
[1] Xi'an Modern Chemistry Research Institute, Xi'an
来源：
Huozhayao Xuebao/Chinese Journal of Explosives and Propellants | 2019年 / 42卷 / 01期
关键词：
Cylinder test; Expansion rate; Explosion mechanics; Shell; Shock wave; Underwater blast; Underwater warhead;
D O I：
10.14077/j.issn.1007-7812.2019.01.009
中图分类号：
学科分类号：
摘要：
To study the influence of shell on the short-range characteristics of underwater blast, the Φ25mm cylinder test and the sliding detonation test of Φ25mm bare grain were carried out under water. The shock wave traces of charge with shell and charge without shell and the expansion traces of shell and bubble were compared and analyzed. The results show that the attenuation effect of shell on shock wave after explosion is obvious. The underwater blast shock wave front pressure and shock wave propagation speed of the shelled charge remain approximately the same at relatively low initial values (0.9GPa, 0.78mm/μs), while the underwater blast shock wave front pressure and the velocity of shock wave propagation of the bare charge are rapidly decaying from the higher initial value (8.5GPa,0.92mm/μs) in an exponential form. Due to the different influences of the shell on the expansion process during different expansion periods, the expansion rate of the shells with the shelled charge in the early (0-5μs) and late stages (after 20μs) of underwater explosions is lower than the rate of expansion of the bare charge bubble, and the expansion rate of the shells with the shelled charge in the medium term (5-20μs) of underwater explosions is higher than the rate of expansion of the bare charge bubble. © 2019, Editorial Board of Journal of Explosives & Propellants. All right reserved.
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页码：58 / 62
页数：4
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