双破片同时撞击对B炸药冲击起爆的数值模拟研究

贾宪振; 陈松; 杨建; 王建灵

doi:10.11858/gywlxb.2011.05.014

双破片同时撞击对B炸药冲击起爆的数值模拟研究

doi: 10.11858/gywlxb.2011.05.014

西安近代化学研究所，陕西西安 710065

详细信息

通讯作者:
贾宪振

计量
- 文章访问数: 7755
- HTML全文浏览量: 286
- PDF下载量: 497
出版历程
- 收稿日期: 2010-06-07
- 修回日期: 2010-10-26
- 发布日期: 2011-10-15

Numerical Study of Explosives Initiation by Simultaneous Impact from Two Fragments

Xi'an Modern Chemistry Institute, Xi'an 710065, China

More Information

Corresponding author: JIA Xian-Zhen

摘要

摘要: 采用Lee-Tarver点火增长模型对单钨珠撞击带壳B炸药的过程进行了计算，所得到的不同尺寸钨珠引爆炸药的阈值速度与实验结果吻合良好。数值模拟了双钨珠同时撞击带壳B炸药的过程，计算了破片引爆炸药的阈值速度，分析了炸药的点火增长过程。结果表明：双破片同时撞击炸药时，引爆阈值速度随着破片间距的增大呈抛物线规律增大；当破片间距较大且撞击速度略高于阈值速度、双破片同时撞击时，炸药内部爆轰波的初始形态随破片速度而变化。
- 爆炸力学 /
- 冲击起爆 /
- 破片撞击 /
- 阈值速度 /
- 点火增长模型
Abstract: The explosives initiation by simultaneous impact from two fragments was simulated based on Lee-Tarver ignition and growth model by using finite element code LS-DYNA. In order to verify the simulation method and parameters, the courses that tungsten spheres with different diameters impacted tantalum covered Composition B charges were simulated, and the critical velocity to ignite Composition B was gained, which accorded well with the experimental results. The problems that two tungsten spheres with three kinds of diameters impacted Composition B charges were simulated. It can be found that the critical velocity to ignite explosives by two fragments, which was lower than one tungsten sphere condition, varied with the distance between the two fragments approximately in term of parabolic curve. When the impact velocity was equal to or slightly larger than the critical velocity, there can be different shapes of detonation wave appearing in the charge, including spherical, W-shape, V-shape, VW-shape and so on.
- mechanics of explosion /
- shock initiation /
- fragment impact /
- critical velocity /
- ignition and growth model

HTML全文

参考文献(14)

Fu J H M, Cort G E. Numerical Calculation of Shock-to-Detonation from Projectile Impact, LA-8816-MS [R]. USA: Los Alamos Sci Lab, 1981.

Bahl K L, Vantine H C, Weingart R C. The Shock Initiation of Bare and Covered Explosives by Projectile Impact [A]//Proceedings of the 7th Symposium (International) on Detonation [C]. Annapolis, MD, USA, 1981: 325-335.

Lee E L, Tarver C M. Phenomenological Model of Shock Initiation in Heterogeneous Explosives [J]. Phys Fluids, 1980, 23(12): 2362-2372.

Chen H L, Jiang J W, Men J B. Numerical Simulation of Fragment Impacting on Charge with Aluminum Shell [J]. Chinese Journal of High Pressure Physics, 2006, 20(1): 109-112. (in Chinese)

陈海利, 蒋建伟, 门建兵. 破片对带铝壳炸药的冲击起爆数值模拟研究 [J]. 高压物理学报, 2006, 20(1): 109-112.

Zhao X L, Qu M, Lu Z H. Numerical Simulation on the Impact Effect of Three Type Fragments Impacting Steel-Covered Charge [J]. Journal of Ballistics, 2009, 21(4): 72-75. (in Chinese)

赵小笠, 屈明, 路中华. 三种破片对带壳炸药冲击起爆能力的数值分析 [J]. 弹道学报, 2009, 21(4): 72-75.

Chen J K, Ching H K, Allahdadi F A. Shock-Induced Detonation of High Explosives by High Velocity Impact [J]. J Mech Mater Struc, 2007, 2(9): 1701-1721.

Murphy M J, Lee E L, Weston A M, et al. Modeling Shock Initiation in Composition B [A]//Proceedings of the 10th Detonation Symposium [C]. Boston, MA, USA, 1993.

Leininger L, Springer H K, Mace J, et al. Modeling Three-Dimensional Shock Initiation of PBX 9501 in ALE3D [A]//Proceedings of the MABS Conference [Ｃ]. Oslo, Norway, 2008.

Tarver C M, Hallquist J O, Erickson L M. Modeling Short Pulse Duration Shock Initiation of Solid Explosives [A]//Proceedings of the 8th Symposium on Detonation [C]. Albuquerque, NM, USA, 1985.

Zhang G R, Chen D N. The Initiation Dynamics in Condensed Explosives [M]. Beijing: National Defense Industry Press, 1991: 248-259. (in Chinese)

章冠人, 陈大年. 凝聚炸药起爆动力学 [M]. 北京: 国防工业出版社, 1991: 248-259.

Mader C L. Two-Dimensional Homogeneous and Heterogeneous Detonation Wave Propagation [A]//Proceedings of the 6th Symposium (International) on Detonation [C]. San Diego, CA, USA, 1976.

施引文献

资源附件(0)

访问统计