线圈磁场对金属射流有效箍缩作用时间分析
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摘要
励磁线圈磁场对金属射流的有效箍缩作用时间,对试验设计和破甲弹威力电磁增强技术工程化应用至关重要。采用理论分析和有限元仿真计算相结合的方法,分析了励磁线圈磁场对金属射流的作用特性及有效箍缩作用时间。结果表明,金属射流凸起部分的节点电磁力大于同时刻凹陷部分的对应值;当脉冲电流频率为50 kHz时,其激发磁场使金属射流发生有效变形的时间为3μs≤t≤6.5μs,该时间确保金属射流颈缩部位产生足够大的磁压力差,使金属射流发生有效变形。
Effective pinch effect time of coil magnetic field on shaped charge jet is very important for test design and engineering application of High-Explosive Anti-Tank(HEAT) electromagnetic enhancement. The effect characteristics and effective pinch effect time of coil magnetic field on shaped charge jet are analyzed with theoretical analysis and finite element simulation calculation. The results showed that, electromagnetic force of the protuberance of shaped charge jet is bigger than that of the pit at the same time. Time is between 3μs and 6.5μs, which makes shaped charge jet to generate effective deform with magnetic field of coil when the frequency of pulse current is 50 kHz, it can produce large enough magnetic pressure difference, and make shaped charge jet to generate effective deform.
Effective pinch effect time of coil magnetic field on shaped charge jet is very important for test design and engineering application of High-Explosive Anti-Tank(HEAT) electromagnetic enhancement. The effect characteristics and effective pinch effect time of coil magnetic field on shaped charge jet are analyzed with theoretical analysis and finite element simulation calculation. The results showed that, electromagnetic force of the protuberance of shaped charge jet is bigger than that of the pit at the same time. Time is between 3μs and 6.5μs, which makes shaped charge jet to generate effective deform with magnetic field of coil when the frequency of pulse current is 50 kHz, it can produce large enough magnetic pressure difference, and make shaped charge jet to generate effective deform.
引文
[1] WANG Cheng,HUANG Fenglei,NING Jianguo.Jet formation and penetration mechanism of W typed shaped charge[J].Acta Mechanica Sinica,2009,25(1):107-120.
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[10] FEDOROV S V,BABKIN A V,LADOV S V.Magnetocumulative effect during explosion of a shaped charge with an axial magnetic field produced in its liner[J].Zhurnal Tekhnicheskoi Fiziki,2003,73(8):111-117.
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[12] 孟学平,雷彬,向红军,等.励磁线圈磁场约束金属射流变形的作用机理研究[J].振动与冲击,2017,36(24):195-203.
[13] 齐文达,雷彬,李治源,等.轴向脉冲电流对射流线性不稳定性的作用[J].强激光与粒子束,2015,27(8):085002-1—085002-6.
[14] 孟学平,雷彬,向红军,等.外磁场对金属射流的作用机理[J].高电压技术,2017,43(9):3042-3049.
[15] 罗又天,李治源,郭春龙.外部轴向磁场对聚能金属射流增强作用的仿真研究[J].弹箭与制导学报,2014,34(6):91-94.
[2] HAN Fang,HU Yang,ZHANG Han.Numerical simulation of the shaped charge jet velocity effected by warhead shell[J].Journal of Beijing Institute of Technology,2009,18(2):131-135.
[3] LI X D,YANG Y S,LV S T.A numerical study on the disturbance of explosive reactive armors to jet penetration[J].Defence Technology,2014,10(1):66-75.
[4] 侯秀成,蒋建伟,陈智刚.有效射流结构模式的数值模拟[J].爆炸与冲击,2014,34(1):35-40.
[5] HUSSAIN G,HAMEED A,HORSFALL I,et al.Experimental and simulation optimization analysis of the Whipple shields against shaped charge[J].Acta Mechanica Sinica,2012,28(3):877-884.
[6] ОРЛНКО К Л.爆炸物理学:第三版[M].孙承纬,译.北京:科学出版社,2011:1048-1061.
[7] SHVETSOV G A,MATROSOV A D,FEDOROV S V,et al.Effect of external magnetic fields on shaped-charge operation[J].International Journal of Impact Engineering,2011,38(6):521-526.
[8] SHVETSOV G A,MATROSOV A D,FEDOROV S V,et al.Electromagnetic control of the shaped-charge effect[C]// IBS.Proceedings of the 19th International Symposium of Ballistics.Orlando:IBS,2001:851-857.
[9] SHVETSOV G A,MATROSOV A D.Disruption of shaped charge jets by a pulsed current[J].Journal of Applied Mechanics and Technical Physics,2004,45(2):269-275.
[10] FEDOROV S V,BABKIN A V,LADOV S V.Magnetocumulative effect during explosion of a shaped charge with an axial magnetic field produced in its liner[J].Zhurnal Tekhnicheskoi Fiziki,2003,73(8):111-117.
[11] 俎栋林.电动力学[M].北京:清华大学出版社,2006:111-117.
[12] 孟学平,雷彬,向红军,等.励磁线圈磁场约束金属射流变形的作用机理研究[J].振动与冲击,2017,36(24):195-203.
[13] 齐文达,雷彬,李治源,等.轴向脉冲电流对射流线性不稳定性的作用[J].强激光与粒子束,2015,27(8):085002-1—085002-6.
[14] 孟学平,雷彬,向红军,等.外磁场对金属射流的作用机理[J].高电压技术,2017,43(9):3042-3049.
[15] 罗又天,李治源,郭春龙.外部轴向磁场对聚能金属射流增强作用的仿真研究[J].弹箭与制导学报,2014,34(6):91-94.