Numerical simulation of effect of initiation positions on detonation driving of reactive fragment warhead

In order to investigate the explosive driving behaviors of reactive fragment warhead, the influencing characteristics of collar initiation, center point initiation, two-end initiation and surface initiation on the initial velocity and load of reactive fragments were analyzed and compared using the numerical simulation method The numerical simulation results demonstrate that the fragments located in the equatorial plane invariably have the maximum initial velocity which is independent of initiation positions, the initial velocity of reactive fragment at the center point initiation position is the highest and increases by 5.8% compared with that at the collar initiation, the average initial velocity of reactive fragment at the surface initiation position is the highest; the load applied to the reactive fragment is the greatest at the two-end initiation position and is 43.5% greater than that at the collar initiation, while the load applied to the reactive fragment is the smallest at the surface initiation position and decreases by 13% and 39% compared with those at the collar initiation and the two-end initiation positions, respectively. In addition, the average load applied to the reactive fragment at the surface initiation position is the smallest.