CHINESE JOURNAL OF ENERGETIC MATERIALS
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固体炸药起爆的经典分子动力学研究进展
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谭晓莉(1977-),女,博士研究生,从事爆轰过程的分子动力学模拟。e-mail: xl-tan@yeah.net

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国家自然科学基金项目资助(10176035)


Review on Classical Molecular Dynamics Studies of Initiation in Solid Explosives
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    摘要:

    现代高性能计算机上所进行的包含几百万个原子的分子动力学模拟,能够在原子尺度提供对于含能材料中爆轰过程的直观理解,本文综述应用经典分子动力学方法研究固体炸药冲击起爆问题的历史及现状。首先简要回顾分子动力学方法的发展; 然后重点介绍应用这一方法研究固体炸药起爆问题的三个主要方面——固体炸药的冲击起爆机理、爆轰波的性质与能量转换机制、固体炸药的势函数; 最后对固体炸药冲击起爆的分子动力学研究所面临的问题及其发展趋势进行了探讨: 由于过于理想化的含能材料模型以及计算能力不足这两方面的限制,在可预见的未来,固体炸药起爆的经典分子动力学研究主要保持在建立模型以及定性研究的阶段。

    Abstract:

    Using modern computers,multimillion-atom molecular dynamics simulations can offer a direct insight into the atomic processes of detonation in energetic materials. In this paper,history and recent advances of classical molecular dynamics studies of shock initiation in solid explosives are reviewed.The molecular dynamics method was first introduced by Alder and Wainwright in the late 1950s to study the interactions of hard spheres. All of the following studies emerged from their works. Section 2 of this paper will tell you something about molecular dynamics,such as the theoretical foundations of this method,the development of it and its applications in many fields.Karo and Hardy appear to have carried out the first molecular dynamics simulations of shock-induced exothermic reactions in 1977. From then on,a great deal works have been done to study the detonation in energetic material using this method. In section 3,we focus on the following three aspects of these works. First,shock initiation mechanism in solid explosives,the results of simulations on homogeneous explosives and heterogeneous explosives are presented respectively. Secondly,properties of shock waves and energy transition mechanism. Thirdly,potential functions of solid explosives,that developed from pair-potential to many body potential,REBO model from Brenner and co-workers was in common used recently:V=∑N.-i=1∑N.-j=i+1{fc(rij)·[VR(rij)·[VR(rij)-ij·VA(rij)]+VvdwAt the end of this paper,some difficulties and possible directions of further researches are discussed: because of the limitation in highly idealized representation of the energetic material and insufficient computer power,studies are more likely to remain in a qualitative,model-building capacity for the foreseeable future.

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谭晓莉,曾新吾,王裴.固体炸药起爆的经典分子动力学研究进展[J].含能材料, 2005, 13(1):61-68.
TAN Xiao-li, ZENG Xin-wu, WANG Pei. Review on Classical Molecular Dynamics Studies of Initiation in Solid Explosives[J]. Chinese Journal of Energetic Materials, 2005, 13(1):61-68.

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  • 收稿日期: 2004-04-28
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  • 在线发布日期: 2011-11-03
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