钽罩结构参数对EFP成型及侵彻性能的控制

郭腾飞; 李伟兵; 李文彬; 洪晓文

doi:10.11858/gywlxb.20170667

钽罩结构参数对EFP成型及侵彻性能的控制

doi: 10.11858/gywlxb.20170667

南京理工大学智能弹药技术国防重点学科实验室, 江苏南京 210094

基金项目:

江苏省普通高校研究生科研创新计划项目 KYCX17_0390

江苏省"青蓝工程"项目

详细信息

作者简介:
郭腾飞(1993—), 男, 硕士研究生, 主要从事聚能装药战斗部技术研究.E-mail:nustgtf@126.com

通讯作者:
李伟兵(1982—), 男, 博士, 副研究员, 博士生导师, 主要从事弹丸的终点效应与目标毁伤技术研究.E-mail:njustlwb@163.com

中图分类号: TJ410.3
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出版历程
- 收稿日期: 2017-10-30
- 修回日期: 2017-11-16

Controlling Effect of Tantalum Liner's Structural Parameters on EFP Formation and Penetration Performance

ZNDY of Ministerial Key Laboratory, Nanjing University of Science and Technology, Nanjing 210094, China

摘要

摘要: 针对钽材料在成型装药战斗部中的应用问题，采用LS-DYNA仿真软件，研究了弧锥结合形钽药型罩结构参数（药型罩锥角、药型罩壁厚和药型罩圆弧半径）对EFP成型及侵彻性能的影响。揭示了各结构参数对EFP成型性能的控制规律，其中药型罩锥角控制EFP的轴向拉伸及径向收缩的能力，药型罩壁厚控制EFP的头部速度及尾部断裂与外张情况，药型罩圆弧半径控制EFP的头部形态及其绝对实心长度。获得了成型性能较佳的钽罩结构参数取值范围，其中药型罩锥角为143°~147°，药型罩壁厚、圆弧半径分别为0.024~0.026倍和0.7~0.8倍装药口径。各结构参数对EFP侵彻深度及侵彻孔径影响的主次顺序分别为：药型罩圆弧半径、药型罩锥角、药型罩壁厚和药型罩锥角、药型罩壁厚、药型罩圆弧半径。确定了EFP成型及侵彻性能均较佳的钽罩结构参数组合：药型罩锥角为145°，药型罩壁厚、圆弧半径分别为0.025、0.70倍装药口径。
- EFP /
- 钽 /
- 药型罩 /
- 实心长度 /
- 数值模拟
Abstract: Aiming at the problems concerning the application of tantalum in a shaped charge warhead, we investigated the influences of the arc-cone tantalum liner's structural parameters (cone angle, wall thickness and radius of curvature) on the formation and penetration performance of EFP using the LS-DYNA finite element software, revealed how these various structural parameters affected the formation performance of EFP:the cone angle of the liner determines the capacity of the axial tension and the radial shrinkage of EFP, the head velocity and tail fracture and outward expansion of EFP are determined by the thickness of the liner, the head shape and the absolute solid length of EFP are determined by the radius of the curvature.The range of the structural parameters of the tantalum liner with better formation performance of EFP was obtained:the cone angle ranged from 143° to 147°, the thickness and radius of the curvature ranged from 0.024 to 0.026 and 0.7 to 0.8 times of the charge diameter.The order was found out in which various structural parameters exert their influence on the penetration depth and aperture of EFP:the radius of the curvature, the cone angle, the wall thickness and cone angle, the wall thickness, the radius of the curvature.The optimal combination of the structural parameters of the tantalum liner that would bring about a better formation and penetration performance of EFP was proposed:the cone angle is taken for 145°, the thickness and radius of the curvature are taken for 0.025 and 0.70 times that of the charge diameter.
- EFP /
- tantalum /
- liner /
- solid length /
- numerical simulation

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图 1 钽罩EFP战斗部结构图

Figure 1. Diagram of tantalum liner EFP warhead

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图 2 有限元模型

Figure 2. Finite element model

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图 3 EFP成型性能指标示意图

Figure 3. Schematic diagram of molding performance indicator of EFP

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图 4 头部速度随药型罩锥角的变化

Figure 4. Variation of v_tip along α

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图 5 EFP成型指标随药型罩锥角的变化曲线

Figure 5. Variation of molding performance indicator of EFP along α

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图 6 头部速度随药型罩壁厚的变化

Figure 6. Variation of v_tip along s

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图 7 EFP成型指标随药型罩壁厚的变化曲线

Figure 7. Variation of molding performance indicator of EFP along s

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图 8 头部速度随药型罩圆弧半径的变化

Figure 8. Variation of v_tip along R

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图 9 EFP成型指标随药型罩圆弧半径的变化曲线

Figure 9. Variation of molding performance indicator of EFP along R

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图 10 不同因素水平下的EFP侵彻性能指标

Figure 10. Indicator of penetration performance from EFP along factors

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表 1 装药及壳体结构参数设计

Table 1. Design of charge and shell’s structural parameters

D_k/mm	H/mm	β/(°)	t/mm
100	90	45	5

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表 2 钽材料J-C本构方程参数^[12]

Table 2. Parameters of J-C constitutive equation for tantalum^[12]

A/MPa	B/MPa	n	C	m
142	164	0.314 8	0.057	0.883 6

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表 3 空气、壳体及炸药材料参数^[13]

Table 3. Parameters of air, shell and explosive^[13]

Air	C	γ₀	S₁	S₂	S₃	ρ/(kg·m^-3)
Air	0.344	1.4	0	0	0	1.25

Shell (45 steel)	A/MPa	B/MPa	C	n	m	ρ/(g·cm^-3)
Shell (45 steel)	496	434	0.014	0.26	1.03	7.83

Explosive (JH-2)	D/(km·s^-1)	p_CJ/GPa	A/GPa	B/GPa	G	ρ/(g·cm^-3)
Explosive (JH-2)	8.425	29.66	854.5	2.05	-	1.845

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表 4 正交设计各因素水平表

Table 4. Orthogonal design at each level

Level	Factor
Level	α	s	R
1	143	2.4	70
2	145	2.5	75
3	147	2.6	80

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表 5 正交计算表(200 μs)

Table 5. Orthogonal table (200 μs)

Project	Factor			Indicator of penetration performance
Project	α	s	R	P/mm	D/mm
1	1	1	1	143.26	50.16
2	1	2	2	137.37	52.44
3	1	3	3	135.91	49.36
4	2	1	2	131.38	49.24
5	2	2	3	130.88	49.98
6	2	3	1	148.01	50.12
7	3	1	3	129.46	50.78
8	3	2	1	131.77	52.06
9	3	3	2	131.38	50.88

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表 6 极差分析表

Table 6. Polar difference analysis

Result of analysis	Indicator of P			Indicator of D
Result of analysis	α	s	R	α	s	R
K₁	416.54	404.1	423.04	151.96	150.18	152.34
K₂	410.27	400.02	400.13	149.34	154.48	152.56
K₃	392.61	415.3	396.25	153.72	150.36	150.12
K₁/3	138.85	134.7	141.01	50.65	50.06	50.78
K₂/3	136.76	133.34	133.38	49.78	51.49	50.85
K₃/3	130.87	138.43	132.08	51.24	50.12	50.04
S	7.98	5.09	8.93	1.46	1.43	0.81

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表 7 优化方案下钽EFP的成型及侵彻性能参数

Table 7. Formation and penetration performance parameters of Ta EFP in optimization

Formulation picture	Parameter of forming performance			Parameter of penetration performance
Formulation picture	v_tip/(m·s^-1)	l/L_p	d/D_p	P/D_k	D/D_k
	1 973	0.55	0.67	1.46	0.51

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