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利用LS-DYNA有限元软件对切割式多爆炸成形弹丸(MEFP)的弹丸成形过程进行了数值模拟,分析了药型罩的变形、蜂巢结构的切割特性和MEFP的速度和空间分布特点。结果表明,蜂巢切割结构可以有效地分割大曲率药型罩,最终形成具有空气动力外形良好、速度梯度分布合理的多个EFP,其散射空间和覆盖面可有效提高对目标的毁伤概率。数值模拟技术可以指导爆炸成形弹丸战斗部的设计和分析,有助于研究EFP的形成过程,对进一步展开聚能装药的理论研究也具有一定的指导作用。
The projectile forming process of MEFP was simulated by using LS-DYNA finite element software. The deformation of honeycomb structure, cutting characteristics of honeycomb structure and the velocity and spatial distribution of MEFP were analyzed. The results show that the honeycomb cutting structure can effectively separate large curvature drug-type covers, and finally form multiple EFPs with good aerodynamic shape and reasonable speed gradient distribution. The scattering space and coverage can effectively improve the probability of damage to the target. The numerical simulation technology can guide the design and analysis of the explosive forming projectile warhead and help to study the forming process of EFP. It also has a guiding role to the further theoretical research on the charge-packed charge.