为了给射流形成机理的深入分析及高效聚能装药结构的研究提供参考,基于分段药型罩形成射流时的杵体水回收实验,应用非线性动力学有限元软件LS-DYNA及动态示踪点处理方法研究药型罩形成射流时的材料分配关系。在数值模拟与实验结果对比有较好一致性的前提下,重点研究了无壳装药结构罩顶药高对锥形药型罩形成射流时的材料分配规律。结果表明,罩顶药高在0.2~2.0倍装药直径范围内时,等壁厚锥形药型罩形成射流时的材料分配规律均为自顶向底成指数分布。装药高度增加时,药型罩壁厚方向有更多比例的材料形成射流,而在轴向方向的材料比例不受影响。罩顶药高大于1.6倍装药直径时,射流转化率及对钢靶板穿深增幅均不明显。

In order to provide references for the design of jet formation mechanism and the study on the structure of high efficiency charge, based on experimental result of clubbing water recovery when the jet was formed by a segmented liner, explicit finite software LS-DYNA and tracer point method were used to study the distribution relations of materials when the jet was formed. Under the premise that numerical simulation and experimental results had good consistency, this paper focused on the material distribution law of explosive height above liner with no shell charge structure when the jet was formed by the cone shaped cover. The results indicated that when explosive height above liner was varied from 0.2~2.0 times the charge diameter, the distribution law of the material with the same wall thickness cone shaped jet presented exponential distribution from top to bottom. More proportion material in thickness direction of liner formed jet when charge height increased, while the proportion of material in the axial direction was not affected. When explosive height above liner was greater than 1.6 times the charge diameter, the conversion rate of jet and the penetration depth against steel target did not increase significantly.