Study on Damage Characteristics of Shaped Charge Jet to Underwater Multilayer Target

In order to study the damage characteristics of shaped charge jet to multilayer thin targets under water, the damage mechanism of shaped charge jet penetrating into multilayer thin targets underwater was analyzed by combining numerical simulation with experimental verification. By comparing the difference in penetration results between water and air, the mechanism of multi-damage element synergy in the process of penetration was revealed. The research showed that the damage ability of underwater shaped charge jet is significantly enhanced compared with that in air, and its damage process is mainly composed of shaped charge penetrator penetration, shock wave effect and cavity expansion effect. Based on the Held formula, the mathematical model of radial reaming of projectile penetrating into multilayer thin targets under water is established. An underwater damage experiment involving a shaped charge jet was conducted, and the action law of shaped charge projectile penetrating multilayer thin target under water was obtained. The numerical simulation, experimental results and mathematical model are in good agreement, which verifies the mathematical model of radial reaming of shaped charge projectile penetrating into multilayer target under water. The results of this study can provide technical support for the underwater protection of ships.