Computer Simulation of Concrete Penetration by Shaped-Charge Jets.

摘要

A unified analytical approach to the solution of the shaped-charge penetration in concrete problem has been developed and is presented. The analytical model is correlated to three types of experiments that study the shaped-charge jet-formation process and resulting penetration phenomena. Hydrodynamic finite-element analysis of the explosive detonation, liner collapse, and jet-formation process is compared to a flash x-ray experiment. Analytical predictions of the penetration-time history are compared to experiments where the penetration-time history is monitored. These experiments provide for a determination of the minimum jet velocity for penetration as a function of standoff. Finally, computer predictions of total penetration and hole profile are compared to experiments. These correlations provide for a determination of the jet energy/target hole volume constant for concrete. The method developed is shown to be valid for a broad range of shaped-charge designs in concrete targets. Preliminary investigations with other target materials show the method can be extended to predict penetration for generalized shaped-charge designs into any target as long as some basic target-material properties are known. (ERA citation 08:021656)