董永香, 夏昌敬, 段祝平. 平面爆炸波在半无限混凝土介质中传播与衰减特性的数值分析[J]. 工程力学, 2006, 23(2): 60-65.
引用本文: 董永香, 夏昌敬, 段祝平. 平面爆炸波在半无限混凝土介质中传播与衰减特性的数值分析[J]. 工程力学, 2006, 23(2): 60-65.
DONG Yong-xiang, XIA Chang-jing, DUAN Zhu-ping. NUMERICAL ANALYSIS OF PLANE EXPLOSIVE WAVE PROPAGATION WITH ITS ATTENUATION BEHAVIOR IN SEMI-INFINITE MEDIUM[J]. Engineering Mechanics, 2006, 23(2): 60-65.
Citation: DONG Yong-xiang, XIA Chang-jing, DUAN Zhu-ping. NUMERICAL ANALYSIS OF PLANE EXPLOSIVE WAVE PROPAGATION WITH ITS ATTENUATION BEHAVIOR IN SEMI-INFINITE MEDIUM[J]. Engineering Mechanics, 2006, 23(2): 60-65.

平面爆炸波在半无限混凝土介质中传播与衰减特性的数值分析

NUMERICAL ANALYSIS OF PLANE EXPLOSIVE WAVE PROPAGATION WITH ITS ATTENUATION BEHAVIOR IN SEMI-INFINITE MEDIUM

  • 摘要: 采用非线性软件LS-DYNA,混凝土选用JHC模型的基础上,数值模拟了一维应变下爆炸波在半无限混凝土介质中的传播过程,得到了平面爆炸波在混凝土中随时间和空间的衰减规律,以及在爆炸冲击波作用下,脆性介质混凝土形成破碎区和损伤区的演化特性。数值拟合结果表明,在爆炸近区应力波幅值衰减速率快,材料损伤演化和应力波幅值衰减存在着内在的联系。模拟结果对于爆破与防护工程设计均具有一定的参考价值。

     

    Abstract: The propagation process of explosive wave under uniaxial strain conditions in semi-infinite concrete is simulated by LS-DYNA software.The attenuation laws of plane explosive wave with the time-space in concrete are obtained based on the Johnson-Holmquist-Cook constitute model(JHC) for concrete.The material crushing performance due to the damage evolution formed in the concrete under blast loading is also presented.The fitted curves of the simulation results indicate that the amplitudes of stress waves adjacent to blast sources decrease significantly.It shows that the damage evolution of material is related to the attenuation of the stress wave amplitude.Numerical results will provide reference for the design of blasting and protective projects.

     

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