Forming and penetration characteristics of double cone compound drug type cover

DOI:	10.11809/bqzbgcxb2024.05.009
Keywords:	shaped jet; coupling constraint principle of explosion pressure; drug type cover; numerical simulation
Abstract:	In order to deal with large volume medium and light armor effectively and improve the comprehensive damage ability of armor breaking warhead, this paper designs a double cone type cover based on the coupling constraint principle of explosion pressure. Through the combination of small cone Angle upper cone and large cone Angle lower cone, the penetration depth and reaming diameter are taken into account. The effects of height ratio of drug cover, charge height to charge diameter ratio and wall thickness on jet forming parameters were studied, and penetration analysis was carried out. The results show that the double cone charge cover based on the coupling constraint principle of explosion pressure can maintain the penetration depth of the jet and improve the expansion ability of the jet. The influence trend of three factors such as height ratio of drug cover, height diameter ratio of charge and wall thickness on jet head velocity and fracture time was investigated. The charge height and wall thickness have positive effects on jet fracture time and negative effects on jet head velocity.The wall thickness and height ratio of drug cover have no influence on the flow head velocity and fracture time, but with the increases of height diameter ratio of charge height jet fracture time and the jet head velocity is increased. Finally, the influence curve of charge height to length ratio on jet head velocity and fracture time was determined by a large number of numerical simulations. According to the curve results, the structure and blast height of the double cone charge hood were optimized, which increased the penetration depth of the charge hood by 23% and the perforation aperture by 35%.
Published:	2024-05-31
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