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

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Journal of Vibration and Shock ›› 2023, Vol. 42 ›› Issue (8) : 259-265.

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

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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.

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explosively formed projectile / aerodynamic characteristics / penetration performance / numerical simulation

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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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