Influence of Concrete Target with Pre-Drilled Cavities on the Penetration Performance of a Projectile

The sequence of events during the impact of tandem warhead system was divided based on the damage model of tandem warhead system to concrete target.Combined with the pre damage of front shaped charge to concrete target, the influence of concrete target with pre-drilled cavities on the penetration performance of a projectile was analyzed by numerical simulation, and the analysis results were partly validated by tests.The results of research indicate that the penetration depth of projectile increases when the number of pre-drilled cavity adds with the same cavity depth, but the increase of the penetration depth of projectile is unobvious when the number of pre-drilled cavity reaches some degree.The penetration over loading of projectile decreases along with the adding of the number of pre-drilled cavity when the the penetration depth of projectile is smaller than the depth of pre-drilled cavity, and the influence is slight when the penetration depth of projectile is larger than the depth of pre-drilled cavity.The penetration depth of projectile increases when the depth of pre-drilled cavity adds with the same cavity number.When the penetration depth of projectile is smaller than the depth of pre-drilled cavity, the penetration over loading of projectile becomes a decreasing stage, and the larger the depth of pre-drilled cavity, the longer the decreasing stage.While the influence is slight when the the penetration depth of projectile is larger than the depth of pre-drilled cavity.The results of research can be refered to optimize the design of tandem warhead system.