Numerical Simulation and Experimental Study on the Response Characteristics of Cylindrical Shell Charge under Collaborative Impact of Multiple Projectiles

doi:10.12382/bgxb.2024.0356

Abstract

Abstract:

The response characteristics of cylindrical shell charge under the collaborative impact of multiple explosively formed projectiles (MEFPs) are studied. The response characteristics of cylindrical shell charges with different densities are analyzed by using a combination of theoretical calculation and numerical simulation based on impact detonation tests. The results indicate that the density of MEFPs, λ, and the thickness of cylindrical shell wall both affect the response characteristics. When λ is the same, the initiation time t increases synchronously with the increase in the thickness of cylindrical shell wall. The initiation time for the three wall thicknesses is increased by 2.00, 2.50, and 1.88 times, respectively. Especially when λ is 8 and 5.33, the initiation time shows a linear growth pattern; when h is the same, the initiation time t increases synchronously with the decrease in λ. The initiation time for the four spacings is increased by 2.66, 3.60, 3.25, and 2.50 times, respectively. Moreover, when h is 13mm, the initiation time also shows a linear pattern.The synergistic enhancement effect of MEFPs on cylindrical shell charges is differentiated when h is 13mm. When λ is 18 and 8, the impact initiation time of MEFP on a target is earlier than that of any single explosively formed projectile (EFP), with a maximum advance of about 41.22% and 8.61%, respectively, indicating a significant synergistic enhancement effect. When λ is adjusted to 4, the initiation ability of MEFPs on the cylindrical shell charges gradually converges with that of a single EFP, and the synergistic enhancement effect weakens.

Key words: multiple explosively formed projectiles warhead, cylindrical shell charge, numerical simulation, response characteristics

CLC Number:

TJ55

ZHANG Kun, ZHAO Changxiao, HAN Biao, JI Chong, ZHANG Bo, ZHANG Kaikai, TANG Rong. Numerical Simulation and Experimental Study on the Response Characteristics of Cylindrical Shell Charge under Collaborative Impact of Multiple Projectiles[J]. Acta Armamentarii, 2024, 45(S1): 70-80.

Figures/Tables 19

References 23

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参数	ρ/(g·cm-³)	G/GPa	A₁	B₁	C	m	T_m/K	T_r/K	C_v
高导无氧铜	8.968	46	0.9×10^-3	2.92×10^-3	0.025	1.09	1356	300.15	2.83×10^-6
6063铝合金	2.7	27.6	2.65×10^-3	4.26×10^-3	0.015	1.09	775	294	8.75×10^-6

参数	ρ/(g·cm-³)	G/GPa	A₁	B₁	C	m	T_m/K	T_r/K	C_v
高导无氧铜	8.968	46	0.9×10^-3	2.92×10^-3	0.025	1.09	1356	300.15	2.83×10^-6
6063铝合金	2.7	27.6	2.65×10^-3	4.26×10^-3	0.015	1.09	775	294	8.75×10^-6

λ	h/mm
λ	11	12	13
16	1-1'	1-2'	1-3'
8	2-1'	2-2'	2-3'
5.33	3-1'	3-2'	3-3'
4	4-1'	4-2'	4-3'

λ	h/mm
λ	11	12	13
16	1-1'	1-2'	1-3'
8	2-1'	2-2'	2-3'
5.33	3-1'	3-2'	3-3'
4	4-1'	4-2'	4-3'

d/mm	2	4	6	8
θ₁/(°)	18°39'	19°52'	21°6'	22°20'
θ₂/(°)	9°12'	9°47'	10°22'	10°57'
θ_a/(°)	37°18'	39°44'	42°12'	44°40'