Research On The Damage Of Penetrating Concrete Target By Reverse-order Detonation Series Structure

With the development and application of high strength concrete in protective engineering,how to effectively damage the protective engineering constructed by high strength concrete is very important.It has been proved by practice that the tandem warhead can effectively attack the target as an effective weapon.In this dissertation,a tandem warhead with reverse initiation structure is designed,which has the superiority of penetration depth and aperture,and has superiority on the damage of high strength concrete targets.The research status of shaped charge warhead and jet penetrating concrete targets at home and abroad is analyzed and studied.LS-DYNA is used in this dissertation,a large number of simulation calculations of warhead with tandem structure are carried out.Firstly,the principle of kill element formed by reverse sequence initiation tandem structure is determined.Secondly,the structural parameters,material and partition parameters of the first stage shaped charge in tandem structure are determined.Then,the optimal scheme of the control device in the tandem structure is determined by orthogonal optimization design,and the structural parameters of the blast plate are determined.Next,the forming process of the second-stage shaped charge structure is analyzed,and the optimal parameter scheme of the central pipe is determined by orthogonal optimization design.The influence of the structural parameters of the liner on the forming of the jetting projectile charge is analyzed.Finally,the optimized parameter scheme of tandem structure is used to penetrate and damage the high-strength concrete targets at different blast heights,and the influence of different blast heights on the damage power of tandem structure is explored.In this dissertation,the conclusions of the study are as follows :(1)The first-stage warhead in the reverse sequence initiation tandem structure is designed,and the structure of the firststage shaped charge and the optimal control device are obtained,and the optimal flying plate are obtained,(2)The second-stage warhead with reverse sequence initiation tandem structure is designed,and the optimal material and structural parameters of the central pipe of the secondstage warhead are obtained.The optimal structural parameters of the shaped charge liner of the second-stage warhead are obtained,so that it can match the kill element formed by the firststage warhead,the series kill element with the best comprehensive performance is formed.(3)Simulation data were analyzed,revealing that the blasting height has an influence on the damage ability of the tandem structure,and the best blasting height is 2 times the diameter of the charge.When the tandem structure penetrates the high strength concrete target,it has a large penetration depth and a large aperture.