Research On Damage Effect Of Underwater Shaped Charge Warhead

Due to the advancement of science and technology,the protection ability of underwater targets such as ships has been greatly enhanced,and it is difficult for traditional blasting warheads to cause fatal damage to underwater targets.The jet generated by the shaped charge warhead can effectively penetrate the protective armor of the target,which provides a new idea for improving the damage efficiency of the underwater weapon warhead.In this paper,the motion law of the jet,the law of velocity attenuation,the penetration depth of the jet to the target plate and the propagation process of the shock wave in water are studied.The main work is as follows:（1）The warhead water static armor penetration test was carried out,and the penetration depth of the jet to the steel ingot target after penetrating the 230 mm water medium and 90 mm water medium was obtained,and the penetration depth of the steel ingot target after the jet penetrated the 90 mm cavity was obtained.According to the penetration depth,the penetration depth of the ingot target after the jet formed by the reserved 90 mm cavity warhead penetrates the 90 mm water medium is obtained,and the experimental value and the simulation calculation value are compared and analyzed.（2）A numerical simulation model was established to investigate the penetration depth of the jet into the ingot target,the law of jet movement in the water medium and the law of velocity attenuation.The penetration depth of the jet through the cavity to the ingot target,the law of jet movement in the cavity and the law of velocity attenuation were investigated.The penetration depth of the jet through the water medium,the law of jet movement in the water medium and the law of velocity attenuation were studied under the condition of reserving the cavity of the warhead.（3）The variation law of the penetration depth with the jet penetration of different lengths of media is explored.The propagation process of shock wave in water after the explosion of unreserved cavity warhead and reserved 90 mm cavity warhead,and the variation law of shock wave pressure in a specific direction are explored.The conclusions are as follows:（1）When the jet moves in a long-distance water medium,it will cause itself to break and the continuity will decrease;when moving in an air medium of the same length,the continuity is better than in water;a cavity of a certain length can be reserved to reduce the flow of the jet.Degree of fracture in aqueous media.（2）The velocity reduction of the jet penetrating the air medium at the same distance is much smaller than that in the water medium;a certain length of air is reserved.The cavity is beneficial to reduce the speed reduction of the jet penetrating the water medium.（3）The penetration depth of the jet to the steel ingot target first increased and then decreased with the increase of the length of the jet penetrated into the medium.The penetration depth of the jet penetrating the cavity of the same length to the steel ingot target is greater than the penetration depth of the jet penetrating the water medium of the same length to the steel ingot target;the appropriate height of the water medium can serve as the blast height of the reserved cavity warhead,which can improve the penetration ability of the jet.（4）The propagation process of the shock wave in water with and without cavity warheads is similar to the change of pressure in a specific direction.