Research on the Penetrator Characteristics and Flight Stability of Explosively Formed Penetrator

Yi, Youngsun

doi:2020.23.4.355

J. KIMS Technol > Volume 23(4); 2020 > Article

Research Paper

에너지·탄두 부문

Journal of the Korea Institute of Military Science and Technology 2020;23(4):355-362.
DOI: https://doi.org/10.9766/KIMST.2020.23.4.355 Published online August 5, 2020.

Research on the Penetrator Characteristics and Flight Stability of Explosively Formed Penetrator

Youngsun Yi

The 4th Research and Development Institute, Agency for Defense Development, Korea

EFP 관통자 특성과 비행 안정성에 대한 연구

이영선

국방과학연구소 제4기술연구본부

Correspondence: Youngsun Yi,
Email: piandexp@add.re.kr

Received: 17 February 2020; Revised: 26 May 2020; Accepted: 12 June 2020;

Abstract

EFP composed of explosive, charge and liner generally penetrates standoff a target by Monroe effect. Its performance highly depends on penetrator characteristics and flight stability. Penetration ability can be dramatically reduced when the penetrator reaches the target with AOA, even if the penetrator has high kinetic energy and L/D ratio. Therefore, it is important to research not only penetrator characteristics and but also flight stability. In this work, the effect of liner shape on penetrator characteristics was examined using free flight test and numerical tools. It was found that tip velocity of penetrator was increased with decreasing liner thickness. It was also found that thicker liner had higher static margin leading to better flight status.

Key Words: Explosively Formed Penetrator, Penetrator Characteristic, FEM, Free Flight Test, Flight Stability