均匀炸药冲击起爆和起爆后的行为

李银成

李银成. 均匀炸药冲击起爆和起爆后的行为[J]. 高压物理学报, 2005, 19(3): 247-256 . doi: 10.11858/gywlxb.2005.03.010
引用本文: 李银成. 均匀炸药冲击起爆和起爆后的行为[J]. 高压物理学报, 2005, 19(3): 247-256 . doi: 10.11858/gywlxb.2005.03.010
LI Yin-Cheng. Behaviors of Initiation and after-Initiation for Homogeneous Explosives[J]. Chinese Journal of High Pressure Physics, 2005, 19(3): 247-256 . doi: 10.11858/gywlxb.2005.03.010
Citation: LI Yin-Cheng. Behaviors of Initiation and after-Initiation for Homogeneous Explosives[J]. Chinese Journal of High Pressure Physics, 2005, 19(3): 247-256 . doi: 10.11858/gywlxb.2005.03.010

均匀炸药冲击起爆和起爆后的行为

doi: 10.11858/gywlxb.2005.03.010
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    通讯作者:

    李银成

Behaviors of Initiation and after-Initiation for Homogeneous Explosives

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    Corresponding author: LI Yin-Cheng
  • 摘要: 介绍并分析了Campbell等人研究均匀炸药冲击起爆和起爆后行为所获得的实验结果,但不涉及其冲击起爆条件。Campbell等人的实验表明,足够强的冲击波进入硝基甲烷后,经过若干微秒的感应时间,爆轰发生在隔板与炸药间的界面处。这就是说,在均匀炸药中,足够强的冲击虽非瞬时但直接(指不经过其它过程,如爆燃)引发了爆轰。重新处理后的实验数据表明:硝基甲烷起爆后,爆轰波的净爆速小于正常爆速;当进入硝基甲烷的初始冲击波的有效压力peff由8.82 GPa升至12.14 GPa时,感应时间tind的实验值由3.06 s降至0.705 s。以两相的排平(A,m)物态方程描述爆轰产物,较为严格地重新推导了基于热起爆理论的估算感应时间tind的公式。在上述peff的变化范围内,tind的理论值则由248 s降至0.99 s,明显地高于实验值。这表明,热起爆理论不适于描述硝基甲烷的冲击起爆行为。从本质上讲,热起爆理论对均匀炸药的冲击起爆行为的描述,不符合物质运动的微观图像,因此,它不适于描述均匀炸药的上述行为。

     

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出版历程
  • 收稿日期:  2004-06-02
  • 修回日期:  2004-10-12
  • 发布日期:  2005-09-05

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