Damage of a New Shaped Warhead to Water-Containing Composite Structure

In order to improve the penetration capability of the shaped charge warhead to the water-containing composite structure, a truncated cone-sphere combined liner 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, the truncated cone-sphere combined liner has a larger jet length and a higher jet head velocity compared with the sub-hemisphere-sphere combined liner and the U-shaped-sphere combined liner. It also has the smallest cavity channel formed in the water medium and the radial expansion velocity of the water medium and the largest residual kinetic energy and jet velocity after the penetrated target plate. 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 liner was investigated by simulation, and a orthogonal optimization test was designed. It is found that the influence of these structural parameters on the jet penetration performance decreases in the order of: the cone angle α, height h, side wall thickness a₁, and top wall thickness a₂. When α=26°, h=22 mm, a₁=4.0 mm, and a₂=3.2 mm, the penetration performance of the truncated cone-sphere combined liner is superior, and the residual kinetic energy of the jet in penetrating the after-effect target is 136.2 kJ. This study provides a valuable reference for the design of shaped torpedo warhead and the improvement of torpedo warhead damage power.