Abstract:
In order to improve the penetration ability of the shaped charge warhead to the water-containing composite structure, a truncated cone-ball combined cover was designed, and its jet forming motion law in the water medium and the damage performance to the water-containing composite structure were explored by numerical simulation. It is found that in the process of penetrating the water-containing composite structure, compared with the sub-hemisphere-sphere combined cover and the U-shaped-sphere combined cover, the truncated cone-sphere combined cover has a larger jet length L and a higher jet head velocity Vh. The cavity channel formed in the water medium and the radial expansion velocity Vr of the water medium are the smallest. The residual kinetic energy EK and the residual velocity VK of the jet after the breakdown target plate are the largest. The influence of structural parameters such as cone angle α, height h, side wall thickness a1 and top wall thickness a2 on the jet shape and penetration performance of the truncated cone-spherical combined cover is investigated by simulation technology, and the orthogonal optimization experiment is designed. It can be found that the primary and secondary order of the influence of these structural parameters on the jet penetration performance is the cone angle α > height h > side wall thickness a1 > top wall thickness a2. When α = 26 °, h = 22mm, a1 = 4.0mm, a2 = 3.2mm, the penetration performance of the truncated cone-sphere combined cover is better, and the residual kinetic energy EK of the jet when penetrating the aftereffect target is 136.2KJ. This study has certain reference value for the design of shaped torpedo warhead and the improvement of torpedo warhead damage power.
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