Research On The Cumulative Penetration Effect Of The Projectile Hitting The Concrete Medium Twice

Projectile penetration of the target effect is an important study in the field of military and protection.For solid military projects that are buried deep underground,the single-shot projectile is still extremely difficult to destroy and one of the important ways to deal with multiple repeated attacks has become a target of destruction.Penetration test requires a lot of manpower and financial resources,based on the amount of experiments using numerical simulation,to supplement the test phenomenon.The main research contents are as follows:By comparing different experience formulas,the effect of initial velocity,target strength,target thickness,projectile shape and projectile wheelbase on the penetration process was analyzed.Forrestal formula was used to predict test penetration.Design projectile and concrete target of projectile penetrating concrete target test,obtain the initial velocity of projectile during penetration process by high-speed camera,and obtain the projectile penetration semi-infinite concrete target plate by studying the destruction of target plate after projectile penetration.Through the experimental data processing,we get the law of penetrating depth and deflection angle of the two projectiles penetrated the target plate with different wheelbase at different wheelbase,and analyze the reason of increment and deflection of secondary invasion.The process of the oval projectile penetrating the concrete target was studied by using the numerical simulation method.Based on the target plate after penetrating and destroying once again,the quadratic modeling and the more realistic characterization of the damage of the target plate Roughly destroy the situation and draw the law that the projectile projectile penetrated depth and deflection angle at different wheelbase twice.The comparative analysis shows that the simulation results are in good agreement with the experimental data.