NUMERICAL SIMULATION OF POWER CHARACTERISTICS OF A DRUM WARHEAD UNDER MULTI-POINT DETONATIONS

It was found recently that the blast-fragmentation warhead damage efficiency on the grand target is greatly affected by the ammunition-dropping attitude. The dropping attitude and the dropping velocity change a lot the projection angle of the fragments, making the intended target uncovered. It is hard to control ammunition dropping attitude because of the lateral winds and so on, and other methods are demanded to adjust the dispersion of the fragments. To improve the power of blast-fragmentation warheads, the paper simulated the power characteristics of a drum warhead under static and dynamic detonations. Aiming at the ground armored vehicles, the damage efficiency of the drum warhead under different detonation modes was analyzed based on numerical modeling. The numerical model was first validated by arena experimental results. Then the combined effects of the charge structure and the detonation sequence were explored. The result shows that compared with the cylindrical warhead structure with the same caliber, the fragmentation projection angle of the drum warhead is increased by 55.98%, and the damaged area of the ground military vehicles is increased by 59.3%; Compared with the eccentric two-line synchronous detonation, the drum warhead with eccentric two lines synchronous-sequential detonation can increase the fragmentation projection angle by 18.0%, and increase the dispersion of fragments by 11.48%; Compared with the warhead center detonation, the damage area of drum warhead is less affected by burst height under eccentric two lines sequential detonation. The damage area under the drop speed of 200 m/s, drop angle of 50°, and burst height of 9 m was 47.15 m². By adjusting the structure and the detonation mode of the warhead, the projection angle of fragments can be effectively improved, the coverage area of fragments to the target can be increased, and the damage efficiency of the warhead can be improved.