一种组合药型罩聚能装药战斗部对含水复合结构毁伤的数值模拟及试验研究

为了研究组合药型罩聚能装药战斗部对含水复合结构的毁伤机理，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，对水下组合药型罩聚能装药战斗部侵彻体的形成以及穿靶过程开展研究，采用数值模拟等比例模型对水下组合药型罩聚能装药战斗部对靶板毁伤进行试验验证。研究结果表明，在偏心亚半球缺罩罩顶设计偏心亚半球形罩能够在侵彻体前端形成细长的杆式射流，可以增加整个侵彻体长度和头部侵彻体速度。在穿水和靶板过程中，利用头部杆式射流形成空腔帮助后续侵彻体低阻随进。对靶板毁伤过程的分析发现，与战斗部直接连接的第1层靶板将会受到侵彻体的高速冲击作用和爆炸波沿水介质传播过来的强冲击波联合作用，而随着水层厚度的增加，沿水中传播的爆炸冲击波强度会被迅速衰减，爆炸冲击波对后续靶板的作用变得不明显，主要为侵彻体的冲击作用。最后利用设计的组合药型罩结构开展了试验验证，对比分析了每层靶板的穿孔尺寸，试验结果与数值计算结果符合较好，最大误差小于15%。

Numerical simulation and experimental study on the damage of water partitioned structure by a shaped charge warhead with a combined charge liner

In order to study the damage mechanism of the shaped charge warhead with a combined charge liner to the water containing composite structure, the formation and penetration process of the penetrator formed by the combined charge liner were studied based on the arbitrary Lagrangian-Euler (ALE) fluid structure coupling algorithm in the LS-DYNA. The damage of the shaped charge warhead with composite liner to the target was verified by experiments. A hemispherical liner eccentric to the axis was designed at the top of the original eccentric sub-hemispherical liner. The forming process of the penetrator, the response state of the water medium, the dynamic energy loss in the process of penetrating the target and the damage mechanism to the target were analyzed for the warhead with the combined liner. The results show that the design of the sub-hemispherical liner on the top of the eccentric sub-hemispherical liner can form a slender rod-like jet at the front of the penetrator, which can increase the whole length of the penetrator and the velocity of the head penetrator. In the process of the target, the head rod-like penetrators form a cavity to help the subsequent penetrators follow with low resistance. Through the analysis of the damage process to the target, it is found that the first layer of target directly connected with the warhead will be affected by both the high-speed impact of the penetrator and the strong shock wave transmitted by the explosion wave along the water medium. With the increase of the thickness of the water layer, the intensity of the explosion shock wave propagating along the water will be rapidly attenuated, and the effect of the explosion shock wave becomes less obvious to the subsequent target. The experimental verification was carried out by the warhead with composite liner structure. The perforation size of each target was compared and analyzed. The experimental results are in good agreement with the numerical simulation results, and the maximum error is within 15%.