为研究组合药型罩结构对聚能装药战斗部毁伤性能的影响,基于LS-DYNA软件的任意拉格朗日-欧拉(arbitrary Lagrangian-Eulerian, ALE)流固耦合算法,在验证了选用模型及材料参数有效性的基础上对单一EFP药型罩以及不同结构组合药型罩聚能装药战斗部侵彻体的形成以及侵彻体对靶板的毁伤情况进行研究。研究结果表明,在单一EFP药型罩的基础上添加顶罩形成的组合药型罩能够在聚能装药的作用下形成头部速度更大、构型更长的侵彻体;在顶罩底径及高度为0.2倍装药直径的条件下,顶罩锥角为30°时,组合药型罩形成的侵彻体头部速度相较于其他结构组合药型罩形成的侵彻体头部速度更大,侵彻体长度更长,但侵彻体直径最小,这与应力波在药型罩内部传播以及药型罩周边微元能否满足侵彻体变长情况有关。靶板在组合药型罩作用下的开坑孔径与通孔孔径正相关,开坑孔径、通孔孔径与侵彻深度负相关。在顶罩底径及高度为0.2倍装药直径的条件下,组合药型罩作用下靶板的的开坑孔径与单一EFP药型罩作用下靶板的开坑孔径相差不大;组合药型罩作用下靶板的通孔孔径约为单一EFP药型罩作用下靶板开坑孔径的0.17~0.2倍;组合药型罩作用下靶板的侵彻深度约为单一EFP药型罩作用下靶板侵彻深度的2.7~3.7倍。根据战斗部威力指标,通过添加合适结构的顶罩形成组合药型罩,可在保证开坑孔径的基础上提高战斗部的侵彻深度。

In order to investigate the effect of combined liner structure on the damage performance of shaped charge warhead, the arbitrary Lagrange-Eulerian fluid-structure coupling algorithm based on LS-DYNA software was used to study the formation of penetrator of single EFP shaped charge warhead and different structural combination of shaped charge warhead, as well as the damage of penetrator to target, after verified the effectiveness of the selected model and material parameters. The results indicate that with the addition of top liner before a single EFP liner, the penetrator with higher head velocity and longer configuration can be formed under the shaped charge. Under the condition that the bottom diameter and height of top liner are 0.2 times the diameter of the charge, when the top cone angle is 30°, the head velocity of the penetrator formed by the combined liner is higher than that formed by other combined liner, and the length of penetrator formed by the combined liner is longer than that formed by other combined liner. However, the diameter of the penetrator formed by the combined liner is the smallest, which is related to the propagation of stress waves in the interior of the liner and whether the microelements around the liner can satisfy the requirement of lengthening the penetrator. The hole aperture and through hole aperture under the penetration of combined liner are positively correlated, the hole aperture and through hole aperture are negatively correlated with the penetration depth under the penetration of combined liner. Under the condition that the bottom diameter and the height of the top liner are 0.2 times the diameter of the charge, the hole aperture of the target under the penetration of the combined liner is not significantly different from that under the penetration of the single EFP liner. The through hole aperture of the target under the penetration of the combined liner is about 0.17~0.2 times of the through hole aperture of the target under the penetration of the single EFP liner. The penetration depth of the target under the penetration of combined liner is about 2.7~3.7 times of the penetration depth of the target under the penetration of single EFP liner. According to the power requirements of warhead, the penetration depth of the target can be increased on the basis of ensuring the hole aperture by adding a proper top liner with a suitable structure.