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Volume 30 Issue 3
Jul  2022
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Article Navigation >  Journal of Unmanned Undersea Systems  > 2022  >  30(3): 292-299
GAO Wen-bo, ZHAO Zhen-yu, REN Jian-wei, LU Tian-jian. Effects of Water Covering on Impulse Transfer in Shallow Buried Explosions[J]. Journal of Unmanned Undersea Systems, 2022, 30(3): 292-299. doi: 10.11993/j.issn.2096-3920.2022.03.003
Citation: GAO Wen-bo, ZHAO Zhen-yu, REN Jian-wei, LU Tian-jian. Effects of Water Covering on Impulse Transfer in Shallow Buried Explosions[J]. Journal of Unmanned Undersea Systems, 2022, 30(3): 292-299. doi: 10.11993/j.issn.2096-3920.2022.03.003
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Effects of Water Covering on Impulse Transfer in Shallow Buried Explosions

doi: 10.11993/j.issn.2096-3920.2022.03.003

  • 1. State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;

  • 2. MIIT Key Laboratory of Multifunctional Lightweight Materials and Structures, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China

  • Received Date: 2022-02-18
    Available Online: 2022-07-18
    Abstract
  • Shallow buried explosions covered by water are one of the major threats to armored vehicles fighting in tidal flat areas. Based on the influence of both the water layer and sand layer, the impulse transfer characteristics of shallow buried explosions covered by water are significantly different from those of traditional shallow buried explosions. To characterize the influence of water covering on impulse transfer, this study employed a fluid-structure coupling algorithm to simulate shallow buried explosions covered by water using the finite element software AUTODYN. The results demonstrate that the fluid-structure coupling method can effectively simulate shallow buried explosions covered by water. Water covering enhances the impulse transmitted to the target in shallow buried explosions and the impulse increases with an increasing depth of the water layer. The thickness of the cushion layer placed at the bottom of the explosive also affects impulse transfer. The results of this study can provide useful guide-lines for designing high-performance protection structures for armored vehicles used in tidal flat areas.

     

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