火炸药学报

为了研究背板材料及炸药厚度对破片冲击起爆8701炸药装药的影响,设计了单一破片和双破片冲击起爆屏蔽8701装药的试验。采用AUTODYN-3D软件进行数值模拟,通过改变背板材料及炸药厚度,来改变背板反射波的幅值,探究其对装药起爆阈值的影响。试验结果表明,在本研究装药结构下,除双破片撞击产生的冲击波叠加作用影响装药起爆的速度阈值外,背板反射波亦影响装药起爆的速度阈值。模拟结果表明,临界起爆速度随背板波阻抗的增大而减小; 随炸药厚度的增大,背板反射波的作用逐渐减弱,当炸药厚度增大到30mm时,靠两钨球撞击产生的冲击波叠加起爆装药,背板对双破片冲击装药的临界起爆速度几乎无影响。

To study the influence of back plate material and explosive thickness on the impact initiation of 8701 explosive charge, the tests of single fragment and dual fragments impact initiation shielding 8701 charge were designed. The AUTODYN-3D software was applied to carry out the numerical simulation. The amplitude of back plate reflected wave was changed through changing the back plate material and the thickness of explosive, and the influence of back plate reflected wave on the initiation threshold of charge was explored. The test results show that the initiation velocity threshold of the charge structure is affected both by the shock wave superposition caused by the impact of dual fragments and the back plate reflection wave. The simulation results show that the critical initiation velocity decreases with the increase of the wave impedance of the back plate. Meanwhile, with the increase of the thickness of the explosive, the effect of the reflected wave of the back plate gradually weakens. When the thickness of the explosive increases to 30mm, and the charge is initiated through the superposition of shock waves generated by the impact of two tungsten spheres, and the back plate has little effect on the critical initiation velocity of the dual fragment impacts charge.

引言
1 试验
2 数值模拟
3 结论

表1 单枚钨球对屏蔽8701装药冲击起爆试验结果<br/>Table 1 Experimental results of shielding the initiation of 8701 charge by single fragment impact

表1 单枚钨球对屏蔽8701装药冲击起爆试验结果
Table 1 Experimental results of shielding the initiation of 8701 charge by single fragment impact

图1 试验布局图
Fig.1 Test layout

图2 单破片及双破片的弹托与破片<br/>Fig.2 Fragments and sabots for single and dual fragments

图2 单破片及双破片的弹托与破片
Fig.2 Fragments and sabots for single and dual fragments

表2 双钨球对屏蔽8701装药冲击起爆试验结果<br/>Table 2 Experimental results of shielding the initiation of 8701 charge by dual fragments impact

表2 双钨球对屏蔽8701装药冲击起爆试验结果
Table 2 Experimental results of shielding the initiation of 8701 charge by dual fragments impact

图3 离散化网格模型
Fig.3 Discrete model

表3 炸药模型参数[13]<br/>Table 3 Material parameters of explosive

表3 炸药模型参数[13]
Table 3 Material parameters of explosive

表4 钨球、盖板、背板材料模型<br/>Table 4 Material models of tungsten sphere, cover plate and back plate

表4 钨球、盖板、背板材料模型
Table 4 Material models of tungsten sphere, cover plate and back plate

表5 临界起爆速度的模拟值与试验值对比<br/>Table 5 Comparison of simulated and text values of critical initiation velocity

表5 临界起爆速度的模拟值与试验值对比
Table 5 Comparison of simulated and text values of critical initiation velocity

表6 背板材料模型及临界起爆速度<br/>Table 6 Back plate material model and critical initiation velocity

表6 背板材料模型及临界起爆速度
Table 6 Back plate material model and critical initiation velocity

图4 高斯点位置图
Fig.4 Position of Gauss

图5 不同时刻炸药的压力云图及反应度ALPHA云图<br/>Fig.5 Pressure and ALPHA contours of explosive at different times

图5 不同时刻炸药的压力云图及反应度ALPHA云图
Fig.5 Pressure and ALPHA contours of explosive at different times

图6 两钨球以1250m/s的速度同时撞击炸药厚度4mm的靶标时炸药高斯点处的压力曲线图<br/>Fig.6 Pressure curve at Gauss point of explosive when two tungsten spheres impact the target with the thickness of 4mm at 1250m/s

图6 两钨球以1250m/s的速度同时撞击炸药厚度4mm的靶标时炸药高斯点处的压力曲线图
Fig.6 Pressure curve at Gauss point of explosive when two tungsten spheres impact the target with the thickness of 4mm at 1250m/s

图7 h=8mm,v=1500m/s时,装药轴线处的压力曲线及装药的压力云图<br/>Fig.7 Pressure curve at the axis of explosive and the pressure contour of the charge when h=8mm and v=1500m/s

图7 h=8mm,v=1500m/s时,装药轴线处的压力曲线及装药的压力云图
Fig.7 Pressure curve at the axis of explosive and the pressure contour of the charge when h=8mm and v=1500m/s

图8 不同装药厚度临界起爆速度对比<br/>Fig.8 Comparison of critical initiation velocity under different charge thicknesses

图8 不同装药厚度临界起爆速度对比
Fig.8 Comparison of critical initiation velocity under different charge thicknesses

[1] BAHL K L, VANTINE H C, WEINGART R C. The shock initiation of bare and covered explosives by projectile impact [C]∥ Seventh International Detonation Symposium. Maryland: Office of Naval Research, 1981.
[2]COOK M D, HASKINS P J, JAMES H R. An investigation of the response of secondary explosives to conical-tipped projectiles and oblique impacts [C]∥ AIP Conference Proceedings. Melville:AIP,1994.
[3]COOK M D, HASKINS P J, JAMES H R. An Investigation of projectile and barrier geometry effects on impact initiation of a secondary explosive [C]∥ Proceedings of the American Physical Society Topical Conference on Shock Compression of Condensed Matter. North Holland:American Physical Society, 1991.
[4]COOK M D, HASKINS P J. Fragment impact of energetic materials - a review of experimental studies and an analysis of reaction mechanisms[C]∥ 14th International Detonation Symposium. Maryland: Office of Naval Research, 2010.
[5]GUSTAVSEN R L, DATTELBAUM D M, JOHNSON C E, et al. Experimental studies of rod impact on bare/uncovered PBX 9501 explosive [J]. Procedia Engineering, 2013,58:147-156.
[6]XU Y, GAO P, WANG S. Critical criterion for the shock initiation/ignition of cylindrical charges with thin aluminum shell impacted by steel fragment[J]. Propellants, Explosives, Pyrotechnics, 2017, 42: 921-931.
[7]董小瑞,隋树元,马晓青.破片对屏蔽炸药的撞击起爆研究[J].弹箭与制导学报, 1997(2): 1-4.

Journal of Projectiles, Rockets, Missiles and Guidance

[8]王树山,李朝君,马晓飞,等.钨合金破片对屏蔽装药撞击起爆的实验研究[J].兵工学报, 2001( 2): 189-191.

Acta Armamentarii

[9]卢锦钊,智小琦,李娟娟,等.六棱柱破片冲击起爆带壳B炸药速度阈值研究[J].弹箭与制导学报,2016,36(1): 82-84.

Journal of Projectiles, Rockets, Missiles and Guidance

[10]卢锦钊.六棱柱破片冲击起爆带壳B炸药的速度阈值及影响因素研究[D].太原:中北大学,2016.
[11]梁斌,冯高鹏,魏雪婷.多枚破片冲击引爆带盖板炸药数值模拟分析[J].弹箭与制导学报,2013,36(6):62-69.

Journal of Projectiles,Rockets,Missiles and Guidance

[12]LEE E L,TARVER C M. Phenomenological model of shock initiation in heterogeneous explosive[J]. Physics of Fluids,1980,23(12): 2362.
[13]陶为俊,浣石. RDX-8701炸药二维冲击起爆状态的研究[C]∥第八届全国爆炸力学学术会议. 北京:中国力学学会爆炸力学专业委员会,2007:58-63.

备注

引言

1 试验

2 数值模拟

3 结论

期刊信息

备注

引言

1 试 验

2 数值模拟

3 结 论

期刊信息

1 试验

3 结论