展开角度及起爆位置对轴向展开式定向战斗部性能的影响

为了研究轴向展开式定向战斗部的毁伤效能,采用AUTODYN软件系统分析了展开角度及起爆位置对轴向展开式定向战斗部破片性能的影响,获得了战斗部轴向展开角度及起爆位置对形成破片质量分布、飞散速度及飞散角的影响规律。结果表明,前向爆炸成型弹丸(EFP)速度随轴向展开角增大而逐渐减小。而EFP长径比增加,翼径比为4.2左右,战斗部轴向展开角的增大可提高有效破片质量百分比,破片最大飞散速度出现在距起爆端约33.33%处,起爆位置在装药外侧时战斗部的有效破片百分比达67.57%;选取战斗部的轴向展开角度为60°左右,且起爆点位于最外侧,可实现轴向展开式定向战斗部定向与汇聚打击的高效毁伤功能。

Effect of Expanding Angle and Initiation Position on the Performance of Axial-expanding Directional Warhead

To study the damage efficiency of axial-expanding directional warhead, AUTODYN software was systematically used to analyze the influence of the expansion angle and the initiation position on the fragment performance of axial-expanding directional warhead. The influence law of the axial expansion angle and the initiation position of warhead on the formation of fragment mass distribution, flying dispersion velocity and flying dispersion angle was obtained. Results show that the velocity of the forward explosively formed projectile (EFP) decreases with the increase of the axial expansion angle, while increasing the length-diameter ratio of EFP, taking the wing-diameter ratio of about 4.2, increasing the axial expansion angle of the warhead can improve the percentage of effective fragment mass, and the maximum flying dispersion velocity of the fragment appears at about 33.33% from the initiation end. The percentage of effective fragment of warhead at the outer side of the charge is up to 67.57%. Selecting the axial expansion angle of the warhead as about 60°, and the initiation point located at the outer side of the charge, can realize the effective damage function of directional and convergent strike of axial-expanding directional warhead.