自锻破片侵彻混凝土的数值模拟

为使串联战斗部中的聚能装药结构在短靶距内形成形状和侵彻能力较好的自锻破片(EFP),通过数值模拟的方法,研究了多级串联战斗部中自锻破片的形成及其对混凝土地下掩体的侵彻过程. 通过设计前级聚能装药结构,既保证了随进弹的装药量,又为随进弹的侵彻开辟了适当口径和深度的孔道. 总结了在计算过程中的几个关键步骤和处理方法;研究了药型罩的壁厚、锥角和聚能装药的起爆方式对EFP的影响. 研究结果表明:在二维轴对称的计算模型中,环形起爆方式有利于形成质量较好的EFP;聚能装药的壁厚越大,EFP的直径越大,侵彻深度越小;聚能装药的锥角越大,EFP的直径越大,速度越小.

Numerical Simulation of Explosive Formed Projectiles into Concrete

In order to get an explosively formed projectile (EFP) with good shape and penetration within a short distance, the formation of EFP and the process of its penetrating concrete in a multistage tandem warhead were studied by numerical simulations in this paper. Optimization of the EFP structure could make its subsequent missile carry more explosive, and also enable the EFP to penetrate a hole with the proper diameter and depth in concrete. The key steps and treatment methods of the numerical simulation were summarized. The effects of the thickness and cone angle of the liner and the detonation of the shaped charge on EFP were studied. The results showed that the annular detonation is favorable to form an effectively EFP in the two-dimensional axisymmetric model; the diameter of the EFP increases and the penetration depth decreases with the liner thickness increasing; the velocity of the EFP decreases but the diameter increases with the liner angle increasing.