The Influence of Multi-layer Explosion-proof Structure on the Energy Output of Power Controllable Warhead

doi:10.12382/bgxb.2024.0201

Abstract

Abstract:

To achieve the controllable output of warhead damage power, an explosion-proof device is used to separate the explosives for forming an axial multi-layer composite charge structure. The proportion of detonation explosives is adjusted by converting three detonation methods, thereby achieving three levels of controllable output of damage power. The effects of explosion-proof material properties and impedance matching modes among multiple layers of media on the shock wave attenuation performance is investigated by using the numerical simulation methods. The most effective three-layer explosion-proof structure is then applied to a power controllable warhead, and its three level power differentiation is verified through simulation. When the space occupied by the explosion-proof device is fixed, the explosion-proof performance of three-layer explosion-proof structure made of reasonably selected explosion-proof materials to form is better than that of double-layer explosion-proof structure, which is greatly improved compared to a single-layer structure. For double-layer explosion-proof structure, the inverse form of impedance has a stronger attenuation effect on shock waves compared to the sequential form. The maximum initial velocities of fragments under three detonation methods are 1500m/s, 2000m/s, and 2300m/s, respectively, and the total energy of the shell is 9.27Terg, 26.45Terg, and 34.87Terg, respectively. The proposed three-layer explosion-proof structure can effectively reduce the waste of charge space, and when applied to a power controllable warhead, it can effectively achieve the controllable output of three levels of power with good differentiation, providing important reference for the design of controllable warheads.

Key words: power controllable warhead, multi-layer explosion-proof structure, shock wave attenuation, initiation method

CLC Number:

TJ410

YU Jiaxin, LI Weibing, LI Junbao, BI Weixin, LUO Yusong. The Influence of Multi-layer Explosion-proof Structure on the Energy Output of Power Controllable Warhead[J]. Acta Armamentarii, 2024, 45(S1): 33-42.

Figures/Tables 13

Fig.1 Schematic diagram of axial multi-layer composite charge warhead structure

Table 1 JWL equation of state parameters for explosives

材料	ρ/(g·cm³)	炸药爆速/(m·s^-1)	A/Mbar	B/Mbar	R₁	R₂	ω
8701	1.70	8425	8.524	0.1802	4.6	1.3	0.38
钝黑铝	1.823	8270	7.52	0.12	4.4	1.3	0.33

Table 2 Lee-Tarver equation of state parameters for explosives

材料	I	b	a	x	G₁	c	d	y	G₂	e	g	z
8701	4e6	0.667	0.022	7	140	0.667	0.329	2	1000	0.067	0.333	3
钝黑铝	7e11	0.667	0	20	6500	0.667	0.111	1	200	0.333	1.0	3

Fig.2 Finite element calculation model for the explosion-proof performance of a single explosion-proof material

Fig.3 Pressure values of observation point 1 for different explosion-proof materials

Fig.4 Finite element calculation model of double layer explosion-proof structure

Fig.5 Variation curves of pressures at observing points in different schemes

Fig.6 Finite element calculation model of three-layer explosion-proof structure

Fig.7 Variation curves of pressures at observing points after a three-layer explosion-proof structure

Fig.8 Finite element calculation model for power controllable warhead with a three-layer explosion-proof structure

Fig.9 Variation curves of pressures at observing points under different detonation methods

Fig.10 Variation curves of fragment velocity at observing points under different detonation methods

Fig.11 Variation of total energy of shell over time under different detonation methods

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