爆炸反应装甲防护包络的数值仿真

孙建军; 李如江; 万清华; 张明; 杨玥; 孙淼

doi:10.11858/gywlxb.20180523

爆炸反应装甲防护包络的数值仿真

doi: 10.11858/gywlxb.20180523

中北大学环境与安全工程学院, 山西太原 030051

基金项目:

国家自然科学基金 11572292

详细信息

作者简介:
孙建军(1990-), 男, 硕士研究生, 主要从事兵器安全技术研究.E-mail:1427669391@qq.com

通讯作者:
李如江(1978-), 男, 博士, 副教授, 主要从事装甲与反装甲技术研究.E-mail: liru7841@mail.ustc.edu.cn

中图分类号: O385
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出版历程
- 收稿日期: 2018-03-10
- 修回日期: 2018-04-08

Numerical Simulation of Protective Envelope of Explosive Reaction Armor

School of Environment and Safety Engineering, North University of China, Taiyuan 030051, China

摘要

摘要: 为了得到爆炸反应装甲的防护包络（即爆炸反应装甲与射流的接触面上不同弹着点处的抗弹性能），应用三维有限元分析软件LS-DYNA，对弹着点处于不同位置时反应装甲的抗弹性能进行数值仿真，并开展对比实验。结果表明，仿真结果与实验结果吻合较好。不同弹着点处的抗弹性能存在较大差异，抗弹性能最优区并非反应装甲的对称中心或其附近区域，而是距反应装甲底端22.7倍及46.9倍射流直径处；反应装甲的有效抗弹区域约占65.8%，有效抗弹区内的抗弹性能较边界区提高约37.5%，反应装甲下部的防护效能较上部好。
- 爆炸反应装甲 /
- 弹着点 /
- 防护包络 /
- 抗弹性能
Abstract: In this work, the three-dimensional finite element analysis software LS-DYNA was used to numerically simulate the ballistic performance of explosive reactive armor at different impact points, and the comparative experiments were also carried out in order to obtain the protective envelope of the explosive reaction armor, i.e., the ballistic performance at different impact points on the contact surface between the explosive reaction armor and the jet.The results show that the simulation results agree well with the experimental data.Studies indicate that there is a large difference in the ballistic performance at different impact points.Instead of the responsive armor's symmetrical center and its vicinity, the area with better ballistic performance is located 22.7 and 46.9 times of the jet diameter away from the bottom of the explosive reaction armor.The effective ballistic performance area of the explosive reaction armor accounts for approximately 65.8%, and its ballistic performance increased by about 37.5% compared to that of the border area.Furthermore, the protective capability at the lower part of the reaction armor is better than that at the upper part.
- explosive reactive armor /
- impact point /
- protective envelope /
- anti-ballistic performance

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图 1 实验布局

Figure 1. Experimental setup

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图 2 弹着点示意

Figure 2. Schematic of hit points

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图 3 实验结果

Figure 3. Experimental results

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图 4 数值计算模型

Figure 4. Simulation model

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图 5 仿真与实验结果对比

Figure 5. Comparison between simulation and experimental results

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图 6 纵向中轴线不同弹着点处反应装甲对射流的干扰(t=89 μs)

Figure 6. Interference of ERA to jet at different impact points on longitudinal axis (t=89 μs)

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图 7 纵向中轴线不同弹着点处射流在后效靶侵彻的模拟结果

Figure 7. Simulated witness targets penetrated by jet at different impact points on longitudinal axis

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图 8 纵向抗弹性能变化

Figure 8. Change of longitudinal anti-elastic performance

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图 9 水平方向不同弹着点处反应装甲对射流的干扰(t=89 μs)

Figure 9. Interference of ERA to jet at different impact points in horizontal direction (t=89 μs)

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图 10 水平方向不同弹着点处射流时后效靶侵彻的模拟结果

Figure 10. Simulated witness targets penetrated by jet at different impact points in horizontal direction

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图 11 水平方向抗弹性能变化

Figure 11. Change of horizontal anti-elastic performance

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图 12 非中心区与纵向中轴线的抗弹性能对比

Figure 12. Comparison of anti-elastic performance between non-central zone and longitudinal axis

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图 13 ERA防护结构示意图

Figure 13. Schematic of ERA protective structure

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表 1 主装药和夹层炸药材料参数

Table 1. Parameters of main charge and confined-explosive

ρ/(g·cm^-3)	p_CJ/GPa	I/s^-1	G₁/(10^-13 s·Pa^-1)	D/(km·s^-1)	a	b	c
1.72	27	4.4×10¹⁷	3.1	6.93	0	0.667	0.667
λ_{ig, max}/(m·s^-1)	λ_{G1, max}/(m·s^-1)	λ_{G2, max}/(m·s^-1)	G₂/(10^-11 s·Pa^-1)	d	g	y	z
0.3	0.5	0	4.0	0.111	1.0	1.0	2.0

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表 2 仿真与实验结果对比

Table 2. Comparison between simulation and experimental results

Point	P_max/mm
	Exp.	Sim.
	O	37.8	38.5
O₄	34.5	33.8
O₉	60.0	60.0
A₂	27.8	24.3
A₈	58.4	57.8
B₈	55.1	56.5

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表 3 不同弹着点处射流在后效靶的最大穿深

Table 3. Maximum penetration depth of witness targets penetrated by jet at different impact points

Area	Point	P_max/mm
Longitudinal central axis	B₁	31.3
	B₂	27.2
	B₃	34.6
	B₄	42.1
	B₅	46.4
	B₆	51.8
	B₇	53.6
	B₈	56.5
	B₉	58.6
	O	38.5
	A₁	28.9
	A₂	24.3
	A₃	33.7
	A₄	40.3
	A₅	50.7
	A₆	55.0
	A₇	56.1
	A₈	57.8
	A₉	60.0
Horizontal central axis	O₁	34.8
	O₂	33.1
	O₃	35.6
	O₄	33.8
	O₅	34.0
	O₆	35.1
	O₇	36.2
	O₈	40.8
	O₉	60.0
Non-central area	C₁	28.3
	C₂	43.1
	C₃	45.6
	C₄	56.0
	D₁	25.1
	D₂	43.4
	D₃	52.2
	D₄	58.6
Edge area	E₁	41.3
	E₂	45.1
	E₃	46.8
	E₄	57.2
	G₁	58.5
	G₂	60.0
	F₁	40.1
	F₂	43.5
	F₃	45.0
	F₄	55.8
	H₁	59.0
	H₂	60.0

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参考文献(10)

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