Kinetic Energy Law Of To Bomb High Speed Into Concrete Targets

The research of high-velocity kinetic projectile penetrating into concrete target is a foundation of projectile structural design and significant to military protective engineering, so it is becoming a hot branch of military science.In this paper, the high-velocity penetration of concrete target was classified into three different types by impact velocity:rigid penetration with low velocity, semi-liquid penetration with modest velocity and liquid penetration with high velocity. The penetration process was tentatively and theoretically studied using A-T Model and Forrestal rigid body penetration theroy.The projectile penetrating into concrete target with a speed of 400m/s to 1200m/s was simulated on computer and the output result was compared to the experimental result, which proved that the target material model and parameters setting used in simulation could accurately simulate penetration.Then the high-velocity penetration was studied using the same method and after relative experiment we found the rule:when the impact velocity of projectile with relatively low speed increases, penetration depth almost linearly increases; there is a boundary impact velocity above which penetration depth deceeases or approximately keeps the same when the impact velocity increases. Some factors of this rule were also nanalyzed:the more intensive target, less intensive projectile, more blunt nose of the projectile and larger length-diameter ratio, the less apperent bounary between rigid penetration and semi-liquid penetration and more liable to become semi-liquid penetration.