Dispersion Characteristics of Fragments of the Warhead under Different Initiation Modes

LI Xin; WANG Weili; LIANG Zhengfeng

doi:10.15892/j.cnki.djzdxb.2022.04.007

Journal of Projectiles, Rockets, Missiles and Guidance >

2022 , Vol. 42 >Issue 4: 35 - 42

DOI: https://doi.org/10.15892/j.cnki.djzdxb.2022.04.007

Dispersion Characteristics of Fragments of the Warhead under Different Initiation Modes

LI Xin ¹^,² ,
WANG Weili ¹ ,
LIANG Zhengfeng ²

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¹ College of Weaponry Engineering, Naval University of Engineering, Wuhan 430033, China
² Xi’an Modern Chemistry Research Institute, Xi’an 710065, China

Received date: 2022-02-25

Online published: 2025-05-29

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Abstract

Studying the fragment velocity and dispersion angle of warhead under different initiation modes is the basic premise to evaluate the three-dimensional energy field distribution characteristics of warhead. The calculation models of fragment radial velocity distribution under single point and two-point eccentric initiation are summarized. The radial velocity of single point eccentric initiation can be obtained by adding modified variable function, introducing energy distribution point and theoretical derivation of detonation impulse. The radial velocity of two-point eccentric initiation is mainly obtained based on detonation collision mach wave theory. The calculation model of axial fragment velocity distribution considering the rarefaction effect at both ends is summarized, mainly by introducing a correction function into loading ratio and gurney equation based on the test results. The analysis and comparison show that the calculation model of fragment dispersion deviation angle under axis point initiation proposed by Randers-Pehrson is more accurate, because it considers the difference of axial velocity and characteristic acceleration time, which represent the acceleration process of fragments. It is pointed out that establishing the quantitative calculation model of axial fragment velocity and dispersion deviation angle under eccentric initiation is an important development direction, which is of great significance for the design of directional warhead, the evaluation of damage power and the research of fuze-warhead coordination.

Key words： warhead; initiation modes; fragment velocity; deviation angle; eccentric initiation

Cite this article

LI Xin , WANG Weili , LIANG Zhengfeng . Dispersion Characteristics of Fragments of the Warhead under Different Initiation Modes[J]. Journal of Projectiles, Rockets, Missiles and Guidance, 2022 , 42(4) : 35 -42 . DOI: 10.15892/j.cnki.djzdxb.2022.04.007

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