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Volume 33 Issue 5
Sep 2019
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Chinese Journal of High Pressure Physics  > 2019  >  33(5): 055104.
LIU Jinghan, TANG Ting, WEI Zhuobin, YU Xiaocun, LI Lingfeng, ZHANG Yuanhao. Pressure Characteristics of Shallow Water Explosion near the Rigid Column[J]. Chinese Journal of High Pressure Physics, 2019, 33(5): 055104. doi: 10.11858/gywlxb.20180704
Citation: LIU Jinghan, TANG Ting, WEI Zhuobin, YU Xiaocun, LI Lingfeng, ZHANG Yuanhao. Pressure Characteristics of Shallow Water Explosion near the Rigid Column[J]. Chinese Journal of High Pressure Physics, 2019, 33(5): 055104. doi: 10.11858/gywlxb.20180704
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Pressure Characteristics of Shallow Water Explosion near the Rigid Column

doi: 10.11858/gywlxb.20180704
  • 1.

    Naval University of Engineering, Wuhan 430033, China

  • 2.

    Naval Logistics Collage of PLA, Tianjin 300450, China

  • 3.

    Joint Logistics Support Center Fourth Engineering Agency, Shenyang 110005, China

  • Received Date: 20 Dec 2018
  • Rev Recd Date: 25 Feb 2019
    Abstract
  • Shock wave propagation and bubble jet in the shallow water explosion near a rigid column are affected by many factors. Considering the influence of free water surface, water bottom boundary and rigid column, the coupling numerical model was established based on LS-DYNA, and the feasibility of numerical method is assured by comparison of simulation results and empirical results. The results show that the accuracy of numerical simulation can be better guaranteed if one-third and one-half of the explosive diameter as mesh size is adapted. During the shock wave propagation, the peak pressure in front of the column rises while the cut-off phenomenon causes during the shock wave pressure decreases, and the peak pressure behind the column decreases by approximately 50% while load duration increases. The jet is formed directivity to the column at the complete moment of the first bubble pulsation. The bubble impulse pressure increases most dramatically when the explosive is at a distance of explosive radius from the column, and the depth of the maximum impulse pressure is higher than the depth of explosive.

     

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