EFP构型对其气动特性和侵彻性能影响分析

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振动与冲击 ›› 2023, Vol. 42 ›› Issue (8) : 259-265.

论文

李渊博1，王金相1，赵瑶瑶2，唐奎1，王鸿飞1，陈兴旺1

作者信息 +

Analysis of the influence of EFP configuration on its aerodynamic characteristics and penetration performance

LI Yuanbo1, WANG Jinxiang1, ZHAO Yaoyao2, TANG Kui1, WANG Hongfei1, CHEN Xingwang1

Author information +

文章历史 +

摘要

为综合分析爆炸成型弹丸(EFP)的构型对其气动特性和侵彻性能的影响，实现兼具良好气动特性和侵彻性能的EFP设计。开展了EFP的成型和飞行试验，在试验验证数值有效性的基础上，基于ALE算法分析了后翻型EFP的三种典型构型(实心杆状、小空腔状、大空腔状)的成型过程及气动特性，并进一步开展了三种构型EFP侵彻半无限厚45#钢的数值模拟。结果表明：EFP小空腔结构提高了其飞行稳定性；空腔的增大降低了EFP的存速能力，实心、小空腔、大空腔三种构型的EFP炸高在1000倍弹径（30m）时平均速度降分别为158m.s-1、172m.s-1、210m.s-1；随着EFP空腔的增大，靶板开坑形貌由漏斗状逐渐转为等直径状。从工程实践角度设计EFP构型时，对于近距离目标应选取实心型，对于远距离目标应选取小空腔型。

Abstract

In order to comprehensively analyze the influence of configuration of explosively formed projectile (EFP) on its aerodynamic characteristics and penetration performance, the EFP design with good aerodynamic characteristics and penetration performance is realized. The forming and flight tests of EFP are carried out. On the basis of verifying the numerical validity, the forming process and aerodynamic characteristics of three typical configurations of back-ward-turned EFPs (solid rod, small cavity and large cavity) are analyzed based on ALE algorithm, and the numerical simulation of three configurations of EFPs penetrating semi-infinite thick steel are further carried out. The results show that the small cavity structure of EFP improves its flight stability; the increase of cavity reduces the storage capacity of EFP, and the average velocity decrease of the three types of small-caliber EFPs are 158m.s-1、172m.s-1、210m.s-1 at 1000 times the projectile diameter, respectively; with the increase of EFP cavity, the pit shape of the target plate will gradually change from funnel-shaped to equal-diameter shape. When designing EFP configuration from the perspective of engineering practice, solid type should be selected for short-range targets and small cavity type should be selected for long-range targets.

导出引用

李渊博1，王金相1，赵瑶瑶2，唐奎1，王鸿飞1，陈兴旺1. EFP构型对其气动特性和侵彻性能影响分析[J]. 振动与冲击, 2023, 42(8): 259-265

LI Yuanbo1, WANG Jinxiang1, ZHAO Yaoyao2, TANG Kui1, WANG Hongfei1, CHEN Xingwang1 . Analysis of the influence of EFP configuration on its aerodynamic characteristics and penetration performance[J]. Journal of Vibration and Shock, 2023, 42(8): 259-265

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