破片式战斗部破片与冲击波相遇位置研究

陈兴; 周兰伟; 李向东; 胡诤哲; 张瑞

doi:10.11858/gywlxb.20180591

破片式战斗部破片与冲击波相遇位置研究

doi: 10.11858/gywlxb.20180591

南京理工大学机械工程学院, 江苏南京 210094

详细信息

作者简介:
陈兴(1993-), 男, 硕士, 主要从事弹丸终点效应与目标毁伤技术研究. E-mail:1101650359@qq.com

通讯作者:
周兰伟(1988-), 男, 博士, 讲师, 主要从事弹丸终点效应与目标易损性研究. E-mail:lwzhou@njust.edu.cn

中图分类号: O382.1
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出版历程
- 收稿日期: 2018-06-20
- 修回日期: 2018-07-08

Meeting Location of Fragment and Shock Wave from Blast Fragmentation Warhead

Mechanical Engineering Institute, Nanjing University of Science and Technology, Nanjing 210094, China

摘要

摘要: 为研究破片式战斗部爆炸后破片和冲击波两种毁伤元的相遇位置，先通过ANSYS/LS-DYNA对破片式战斗部的爆炸过程进行数值计算，再通过试验的方法测量破片和冲击波相遇位置，验证了数值计算方法的合理性。在此基础上，分析了装填系数、破片质量、爆速和爆热对相遇位置的影响。结果表明：随着装填系数、破片质量、爆速和爆热的增加，相遇位置减小；装填系数增加31%，相遇位置距爆炸中心的距离减小11.5%；单枚破片质量增加1倍，相遇位置距爆炸中心的距离减小2.4%。
- 破片式战斗部 /
- 破片 /
- 冲击波 /
- 相遇位置
Abstract: In order to study the meeting location of fragments and shock waves after fragmentation warhead explosions, ANSYS/LS-DYNA was first used to numerically calculate the explosion process of the fragmented warhead, and then the location where fragments meet shock wave was experimentally determined, validating the numerical method.On the basis of above results, the influence of k, m, Q_V and Q_T on the meeting location was analyzed.The results show that the meeting location decreases with the increase of k, m, Q_V and Q_T.More precisely, the k increases by 31%, the distance between the meeting position and the explosion center decreases by 11.5%, the m is doubled, and the distance between the meeting position and the explosion center is reduced by 2.4%.
- fragmentation warhead /
- fragment /
- shock wave /
- meeting location

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图 1 战斗部结构示意图

Figure 1. Schematic structure of the warhead

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图 2 战斗部三维计算模型(局部)

Figure 2. Three-dimensional finite element model of the warhead (part)

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图 3 不同时刻破片和冲击波相对位置

Figure 3. Relative locations of fragments and blast wave for different time instants

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图 4 传播距离随时间的变化(数值计算)

Figure 4. Variation of propagation distances with time (Numerical computation)

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图 5 试验装置及布置示意图

Figure 5. Photograph of experimental setup and the arrangement of test devices

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图 6 冲击波超压测试现场布置图

Figure 6. Schematic diagram of experimental setup for blast wave overpressure measurement

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图 7 破片和冲击波运动过程图

Figure 7. Relative locations of fragments and blast wave

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图 8 试验后木块照片

Figure 8. Wood blocks photo after test

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图 9 传播距离随时间的变化(试验)

Figure 9. Variation of propagation distances with time (Test)

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图 10 不同点处超压-时间曲线

Figure 10. Shock wave overpressure versus time at different locations

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图 11 装填系数k对相遇位置的影响

Figure 11. Influence of k on meeting location

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图 12 单枚破片质量对相遇位置的影响

Figure 12. Influence of fragment mass on meeting location

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图 13 不同炸药类型对相遇位置的影响

Figure 13. Influence of different types of explosives on meeting location

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表 1 壳体和破片的主要材料参数表

Table 1. Material parameters of shell and fragments

Material	ρ/(kg·m^-3)	E/GPa	μ	A/MPa	B/MPa	n	m	c/(m·s^-1)	S₁	γ
Alloy	2797	69.63	0.33	265	426	0.34	1	5280	1.4	2
Steel	7850	210	0.28	335

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表 2 炸药材料参数及状态方程参数

Table 2. Material and equation of state (EOS) parameters for explosive

ρ/(kg·m^-3)	D/(m·s^-1)	A/GPa	B/GPa	R₁	R₂	ω	p_CJ/GPa	V₀
1780	8390	581.4	6.8	4.1	1	0.35	34	1

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表 3 空气材料参数及状态方程参数

Table 3. Material and equation of state (EOS) parameters for air

ρ/(kg·m^-3)	C₀/MPa	C₁	C₂	C₃	C₄	C₅	C₆	V	e₀/MPa
1.25	-0.1	0	0	0	0.4	0.4	0	1	0.25

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表 4 木块距战斗部距离

Table 4. Distance between wood blocks and warhead

Shot	Distance/m
Shot	Wood block 1	Wood block 2	Wood block 3	Wood block 4	Wood block 5
1	0.4	0.6	1.2	1.6	2.0
2	1.6	2.0	2.4	2.8	3.2
3	1.6	2.0	2.8	3.2	3.6

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表 5 冲击波到达时间

Table 5. Arrival time of blast wave

Shot	Time/ms
Shot	Wood block 1	Wood block 2	Wood block 3	Wood block 4	Wood block 5
1			0.752	1.832	2.586
2	1.791	2.334	3.009	3.825	4.771
3		2.876	3.762	4.689

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表 6 冲击波到达平均时间

Table 6. Average arrival time of blast wave

Distance/m	Time/ms
1.2	0.752
1.6	1.812
2.0	2.599
2.4	3.009
2.8	3.794
3.2	4.730

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表 7 计算超压值与试验超压值对比

Table 7. Comparison of the numerical and experimental overpressure results

Distance/m	Over pressure/MPa		Error/%
Distance/m	Test	Numerical	Error/%
2.5	0.356	0.3557	8.43
4.3	0.086	0.0912	6.05
6.2	0.04565	0.0489	7.12
8.0	0.0256	0.0241	5.86
10.0	0.0199	0.0217	9.05

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表 8 战斗部及破片参数(L=260 mm，R=96 mm)

Table 8. Parameters of warhead and fragment (L=260 mm, R=96 mm)

Arrangement	k/%	m/g	t/mm	h/mm	Explosive
	37.31	6.00	9	10	8701
1	40.33	6.00	8	10	8701
	43.73	6.00	7	10	8701
	52.34	2.12	5	4	8701
	52.34	4.24	5	6	8701
2	52.34	6.00	5	8.2	8701
	52.34	8.48	5	9.6	8701
	52.34	12.00	5	12	8701
3		6.00	5	8.2	8701/TNT/B/HMX

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表 9 不同类型炸药的相关参数

Table 9. Parameters of different explosives

Explosive	ρ/(kg·m^-3)	Q_V/(m·s^-1)	Q_T/(J·g^-1)	Explosive mass/kg	TNT equivalent	k/%
TNT	1.58	6856	4225	11.00	1.00	44.51
B	1.71	7680	4690	12.37	1.11	50.05
8701	1.72	7980	5300	11.95	1.25	52.34
HMX	1.89	9100	6188	13.13	1.46	58.30

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