起爆位置对预制破片飞散特性影响仿真研究OA北大核心CSTPCD

In order to study the lethal effect of small-caliber prefabricated fragmentation warheads in terminal defense,finite element method was used to simulate the detonation of prefabricated fragmentation warheads.The dispersion characteristics of fragmentation under four detonation conditions:central detonation at the bottom of the charge,single-point off-center detonation,dual-point symmetrical detonation,and dual-point center-off-center detonation was studied.The average final velocity and average scattering angle of the prefabricated fragments,as well as the distribution ratio,under the four detonation conditions were obtained.The research results show that when the detonation position is located at the contral-bottom of the charge,the scattered final velocity of 71.7％of prefabricated fragments is between 300-800 m/s.The scattered final velocity of the prefabricated fragments is approximately 687.1 m/s,and about 91.7％of the fragments'scattering angle are distributed within±45°.After changing the detonation position of the charge,the average scattered final velocity of the prefabricated fragments changes.The average scattered final velocity of the fragments decreased in average final velocity by approximately 1.2％-2.5％,as the off-center distance increased under single-point off-center detonation condition.For the dual-point detonation conditions,the average scattered final velocity of the prefabricated fragments showed a trend of decreasing-increasing-decreasing under dual-point detonation conditions.The average final velocity of fragments can be increased by about 5％when the eccentricity distance is increased appropriately.The average scattering angle of the fragments decreased with the increase of the off-center distance of the detonation position for the off-center detonation.Therefore,in order to enhance the damage capability of the warhead,the off-center distance of the detonation points can be appropriately increased for the dual-point detonation method,For the single-point detonation method,the off-center distance should be appropriately reduced.The research results provide reference for the design of prefabricated fragmentation warhead warheads.