装药参数对整体式多爆炸成型弹丸成型的影响

为提高整体式多爆炸成型弹丸毁伤能力,采用LS-DYNA数值仿真软件模拟了装药参数对整体式多爆炸成型弹丸(MEFP)成型的影响。结果表明,装药间距主要对周边弹丸成型形态与发散角产生影响;随着装药间距的增加,整体式MEFP速度和中心弹丸长径比变化较小,周边弹丸则由长杆形逐渐向"球形"发展,周边弹丸拖尾逐渐减小,弹丸飞行稳定性增强,弹丸发散角也随着装药间距的增加逐渐减小。随着装药长径比的增加,中心弹丸速度和长径比都得到大幅提高,中心弹丸侵彻能力增强;周边弹丸外形则由"球形"逐渐向长杆形发展,周边弹丸拖尾逐渐增大,弹丸飞行稳定性减弱,弹丸发散角则随着装药长径比的增加呈现先增大后减小趋势,故可根据具体目标选择合适的长径比装药,以提高对目标的打击毁伤概率。

Effect of Charge Parameters on Formation of Integral Multiple Explosively Formed Projectiles

To improve the damage ability of integral multiple explosively formed projectiles (MEFP), the effect of configuration parameters of charge on projectile formation was studied using LS-DYNA code.Results show that the charge spacing has great effect on the shape and the radial dispersion angle of surrounding projectile. With increasing the charge spacing, the velocity of integral MEFP and the length-diameter ratio of central projectile change in small ranges, but the shape of surrounding projectile changes from rods to ball shape gradually. The trail of surrounding projectile decreases gradually and the flight stability of projectile enhances. With increasing the charge spacing, the radial dispersion angle of surrounding projectile decrease gradually. With increasing the length-diameter ratio of charge, the velocity and length-diameter ratio of central projectile increase significantly and the penetration performance enhances. The shape of surrounding projectile changes from ball to rods shape gradually. The trail of surrounding projectile increases gradually and the flight stability of projectile decreases. With increasing the length-diameter ratio of charge, the radial dispersion angle of surrounding projectile increases firstly and then decreases, so selecting a suitable length-diameter ratio of charge could improve the damage effect based on definite aim.