三点起爆控制参数对尾翼爆炸成型弹丸成型的影响

李瑞; 李伟兵; 王晓鸣; 李文彬

doi:10.11883/bzycj-2016-0272

三点起爆控制参数对尾翼爆炸成型弹丸成型的影响

doi: 10.11883/bzycj-2016-0272

南京理工大学智能弹药技术国防重点实验室, 江苏南京 210094

基金项目:

国家自然科学基金项目 11202103

江苏省普通高校研究生科研创新计划项目 KYLX16_0481

详细信息

作者简介:
李瑞(1987-), 男, 博士研究生

通讯作者:
李伟兵, njustlwb@163.com

中图分类号: O385;TJ410.51
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出版历程
- 收稿日期: 2016-09-01
- 修回日期: 2017-03-03
- 刊出日期: 2018-05-25

Effects of three-point initiation control parameters on formation of explosively-formed projectiles with fins

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

摘要

摘要: 针对三点起爆控制参数（起爆直径、起爆同步误差）对尾翼爆炸成型弹丸（explosively formed projectile，EFP）成型的影响问题，理论分析了三点起爆条件下爆轰波的马赫碰撞，计算获得了不同起爆直径下马赫波的相关参数，利用LS-DYNA有限元软件通过数值模拟研究了不同起爆直径下三点起爆同步误差对EFP尾翼成型及飞行速度的影响规律。结果表明，起爆直径越大，马赫波在药型罩上的作用面积越小，马赫超压越大，形成的EFP长径比和速度越大；起爆直径为30、40、50 mm三点起爆成型装药形成较佳尾翼EFP应满足的最大起爆同步误差分别为50、100、150 ns；此外，尽量使中间起爆点起爆同步误差约为最大同步误差的一半，有利于降低尾翼EFP的侧向分速度，提高飞行稳定性。
- 三点起爆 /
- 起爆同步误差 /
- 起爆直径 /
- 尾翼爆炸成型弹丸
Abstract: Effects of the three-point initiation control parameters on the formation of an explosively-formed projectile (EFP) with fins were studied, including initiation diameter and initiation synchronization error. The Mach wave parameters (pressure and Mach wave domain area) at the metal liner were calculated theoretically at different initiation diameters. The fin formation and stable-flight velocity of EFP caused by the synchronization error at different initiation diameters were investigated by employing the LS-DYNA software. Results indicate that the Mach wave domain area decreases, but the pressure, final velocity and length-to-diameter ratio of the EFP increase, as the initiation diameter increases. It is noted that a better empennage formation can be approached when the initiation synchronization errors at the initiation diameters of 30, 40, 50 mm are less than 50, 100, 150 ns, respectively. In addition, the lateral velocity of the EFP is lower and the flight stability is higher when the delay time of the middle detonation point is about half the maximum delay time of the three initiation points.
- three-point initiation /
- initiation synchronization error /
- initiation diameter /
- EFP with fins

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图 1 装药结构示意图

Figure 1. Schematic diagram of charge

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图 2 起爆点分布

Figure 2. Detonation point distribution

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图 3 有限元模型

Figure 3. The finite element model

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图 4 不同攻角时，EFP的外形

Figure 4. EFP shapes at different angels of attack

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图 5 爆轰波传播示意图

Figure 5. Diagram of detonation wave propagation

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图 6 不同起爆直径下形成的EFP外形

Figure 6. Shapes of EFPs formed at different initiation diameters

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图 7 EFP速度、长径比与起爆直径的关系曲线

Figure 7. Length-to-diameter ratio and velocity of EFP varied with initiation diameter

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图 8 不同起爆直径下爆轰波对药型罩的作用范围

Figure 8. Mach domain at metal liner by different initiation diameters

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图 9 马赫波区的压力

Figure 9. Pressure in Mach domain

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图 10 EFP尾翼翼长测量示意图

Figure 10. Schematic diagram of lengths of EFP fins

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图 11 不同起爆直径下形成的EFP尾翼翼长偏差随延迟起爆时间的变化

Figure 11. Deviations of fin lengths of EFPs formed under different initiation diameters varying with delay in time to initiation of detonation

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图 12 不同起爆直径下尾翼EFP的侧向分速度随中间起爆点起爆误差的变化

Figure 12. Lateral velocity of the EFPs with fins under different initiation diameters varying with initiation synchronization error of the second initiation point

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图 13 不同起爆直径下尾翼EFP的轴向分速度随中间起爆点起爆误差的变化

Figure 13. Axial velocity of EFP with fins under different initiation diametersvarying with initiation synchronization error of the second initiation point

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表 1 数值计算和试验结果的比较

Table 1. Comparison between numerical and experimental results

l/mm		d/mm		d_w/mm
模拟	试验^[7]	模拟	试验^[7]	模拟	试验^[7]
49.6	>40.0	26.2	26.5	33.2	35.8

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表 2 马赫波区计算结果

Table 2. Results in Mach domain

D_ini/mm	z_O/mm		y_O/mm		h/mm		p/p_CJ
D_ini/mm	理论	模拟	理论	模拟	理论	模拟	理论	模拟
20	8.36	8.27	0	0	2.16	1.98	1.52	1.41
30	12.50	11.70	0	0	1.11	1.08	1.72	1.64
40	16.70	15.90	0	0	0.56	0.50	2.22	2.17
50	20.90	19.80	0	0	0.26	0.23	2.69	2.51

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表 3 三点起爆同步误差分布

Table 3. Distribution of three-point initiation synchronization error

工况	Δt₁/ns	Δt₂/ns	Δt₃/ns
0	0	0	0
1	0	0	50
2	0	50	50
3	0	0	100
4	0	50	100
5	0	100	100
6	0	0	150
7	0	50	150
8	0	100	150
9	0	150	150
10	0	0	200
11	0	50	200
12	0	100	200
13	0	150	200
14	0	200	200
15	0	0	300
16	0	50	300
17	0	100	300
18	0	150	300
19	0	200	300
20	0	300	300

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参考文献(11)

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