Influence of Sequential Initiation Parameters on Damage Effectiveness of Aimed Warhead

In order to improve the damage effectiveness of aimed warhead, the influence of sequential initiation parameters on damage effectiveness of aimed warhead is studied. The initial power parameters of fragments under different sequential initiation parameters are studied by using LS-DYNA finite element program, methods of fragment velocity difference accumulation and dispersion angle accumulation. The damage probability method is used to calculate the damage effectiveness of warhead to ground military vehicles under different sequential initiation parameters. The results show that the number of initiation lines and the angle between initiation lines mainly affect the fragment velocity, and the initiation delay time mainly affects the fragment velocity and the positive and negative proportion of the dispersion angle. Compared with the eccentric one line and three lines sequential initiation, the damage area of eccentric two lines sequential initiation is 7.5–25 m² when the drop height is 7–9 m. When the angle of initiation line increases from 30° to 120°, the damage area of warhead to ground military vehicles is reduced by 3.9%–60.3% at the falling height of 4–8 m. The delay time of sequential initiation increases from 0 to 0.75 times of the propagation time of detonation wave between adjacent initiation points, and the damage area of warhead increases by 8.4%–87.2% when the drop height is 4–8 m. In the initiation mode, by adopting eccentric two lines sequential initiation, the angle between initiation lines of 30°–60°, and the delay time of 0.50–0.75 times of the detonation wave propagation time between adjacent initiation points, the fragment warhead has good damage efficiency to the ground military vehicle target.