Numerical and Experimental Study on the Formation and Dispersion Patterns of Multiple Explosively Formed Penetrators

Abstract

THREE-DIMENSIONAL NUMERICAL SIMULATIONS AND EXPERIMENTS WERE PERFORMED TO EXAMINE THE FORMATION AND SPATIAL DISPERSION PAT-TERNS OF INTEGRAL MULTIPLE EXPLOSIVELY FORMED PENETRATORS (MEFP) WARHEAD WITH SEVEN HEMISPHERICAL LINERS. NUMERICAL RESULTS HAD SUCCESSFULLY DESCRIBED THE FORMATION PROCESS AND DISTRIBUTION PAT-TERN OF MEFP. A GROUP OF PENETRATORS CONSISTING OF A CENTRAL PE-NETRATOR SURROUNDED BY 6 PENETRATORS IS FORMED DURING THE FORMA-TION PROCESS OF MEFP AND MOVES IN THE DIRECTION OF AIMING POSITION. THE MAXIMUM DIVERGENCE ANGLE OF THE SURROUNDING PENETRATOR GROUP WAS 7.8°, AND THE DAMAGE AREA COULD REACH 0.16 M2 AT 1.2 M. THE LAWS OF PERFORATION DISPERSION PATTERNS OF MEFP WERE ALSO OBTAINED THROUGH A NONLINEAR FITTING OF THE PERFORATION INFORMATION ON THE TARGET AT DIFFERENT STANDOFFS. THE TERMINAL EFFECTS OF THE MEFP WARHEAD WERE PERFORMED ON THREE #45 STEEL TARGETS WITH A DIMENSION OF 160CM  160CM  1.5CM AT VARIOUS STANDOFFS (60, 80, AND 120 CM). THE SIMULATION RESULTS WERE VALIDATED THROUGH PENETRATION EXPERIMENTS AT DIFFERENT STANDS. IT HAS SHOWN EXCELLENT AGREEMENT BETWEEN SIMULATION AND EXPERIMENT RESULTS.