序贯起爆参数对定向战斗部毁伤效能的影响

Influence of Sequential Initiation Parameters on Damage Effectiveness of Aimed Warhead

为提高定向战斗部的毁伤效能,明确序贯起爆参数对定向战斗部毁伤效能的影响,运用LS-DYNA有限元程序,采用破片速度差累加和飞散角累加的方法,研究了不同序贯起爆参数下破片初始威力参数,利用毁伤概率法,计算了不同序贯起爆参数下战斗部对地面军用车辆的毁伤效能。结果表明:起爆线个数和起爆线夹角主要影响破片速度大小,起爆延时时间主要影响破片速度大小和飞散角正负占比。相对于偏心一线和三线序贯起爆,偏心两线序贯起爆在落高为7~9 m时有7.5~25.0 m^(2)的毁伤面积。当起爆线夹角由30°增大到120°,落高为4~8 m时,战斗部对地面军用车辆的毁伤面积降低3.9%~60.3%。序贯起爆的延时时间由零增加到0.75倍的相邻起爆点间爆轰波传播时间,落高为4~8 m时,战斗部的毁伤面积增加8.4%~87.2%。当起爆方式采用偏心两线序贯起爆,起爆线夹角取30°~60°,延时时间取0.50~0.75倍的相邻起爆点间爆轰波传播时间时,破片战斗部对地面军用车辆目标具有较好的毁伤效能。

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 m^(2) 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.