外罩开槽式双层药型罩成型受曲率半径影响

2023-06-23 理论教育版权反馈

【摘要】：吴浩宇1，周春桂1，董方栋2，汤雪志1，王志军1摘要：在传统的双层药型罩形成串联EFP 的基础上，提出一种外罩开槽式的新型双层药型罩结构。利用ANSYS／LS-DYNA 软件对该结构的成型进行了数值模拟与分析，并分析了曲率半径对其形成毁伤元的影响。

吴浩宇1，周春桂1，董方栋2，汤雪志1，王志军1

（1.中北大学机电工程学院，山西　太原　030051；2.瞬态冲击技术重点实验室，北京　102202）

摘　要：在传统的双层药型罩形成串联EFP 的基础上，提出一种外罩开槽式的新型双层药型罩结构。利用ANSYS／LS-DYNA 软件对该结构的成型进行了数值模拟与分析，并分析了曲率半径对其形成毁伤元的影响。研究结果表明，该结构能够形成一定毁伤效应的毁伤元，内层药型罩能够形成一定长径比的EFP，外层药型罩可形成一定数量、质量和速度的破片；通过对不同药型罩曲率半径的数值分析与对比，得出随着药型罩曲率半径的增大，内层EFP 长径比逐渐减小，成型后的速度逐渐增大；然而外层破片速度稳定且基本保持不变，由于爆轰面的变化，外层罩所受到的径向分力增大，破片飞散角也随之增大；内、外罩速度差逐渐减小，分离时间逐渐增大。

关键词：双层药型罩；EFP；多破片；数值模拟；成型装药

中图分类号：TJ410.3　文献标识码：A

基金项目：国家自然科学基金资助（11572291）；瞬态冲击技术重点实验室基金（61426060101）；中北大学第十五届科技立项（20181506）

Arc curvature radius influence on forming of double shaped charge liner whit shaped cover with slot

WU Haoyu1，ZHOU Chungui1，DONG Fangdong2，TANG Xuezhi1，WANG Zhijun1

（1.School of Mechanical and Electrical Engineering，North University of China，Taiyuan 030051；2.Science and Technology on Transient Impact Laboratory，Beijing 102202）

Abstract：Based on the traditional double shaped charge liner formed series EFP，a new double shaped charge liner structure was proposed.ANSYS／LS-DYNA software was used to simulate the new structure，and influence factors were analyzed.The results show that the structure can form a certain damage effect of the dam⁃age element，the inner layer cover can form a certain aspect ratio of EFP，and the outer layer cover can form a certain number，mass and speed fragments；The numerical analysis and comparison of the radius of curvature of the hood shows that the length-to-diameter ratio of the inner layer EFP gradually decreases with the increase of the radius of curvature of the hood，and the speed after molding gradually increases；however，the stability of the outer layer fragments remains basically unchanged.Due to the change of the detonation surface，the radial compo⁃nent force of the outer cover increases，and the fragmentation angle of the fragment also increases；the speed difference between the inner and outer covers gradually decreases，and the separation time gradually increases.

Key words：double shaped charge liner；EFP；multi-fragments；shaped charge；numerical simulation

外罩开槽式双层药型罩成型受曲率半径影响

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