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Volume 21 Issue 5
 
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Article Navigation >  Journal of Unmanned Undersea Systems  > 2013  >  21(5): 326-331
BANG Zhi-hui, LIU Rong-zhong, GUO Rui, ZHANG Jun. Simulation on Impact Response to Water Entry of Underwater Acoustic Countermeasure Bullets[J]. Journal of Unmanned Undersea Systems, 2013, 21(5): 326-331. doi: 10.11993/j.issn.1673-1948.2013.05.002
Citation: BANG Zhi-hui, LIU Rong-zhong, GUO Rui, ZHANG Jun. Simulation on Impact Response to Water Entry of Underwater Acoustic Countermeasure Bullets[J]. Journal of Unmanned Undersea Systems, 2013, 21(5): 326-331. doi: 10.11993/j.issn.1673-1948.2013.05.002
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Simulation on Impact Response to Water Entry of Underwater Acoustic Countermeasure Bullets

doi: 10.11993/j.issn.1673-1948.2013.05.002

  • Ministerial Key Laboratory of ZhiNengDanYao, Nanjing University of Science & Technology, Nanjing 210094, China

  • Received Date: 2013-05-07
  • Rev Recd Date: 2013-06-16
  • Publish Date: 2013-10-20
    Abstract
  • The water entry impact of underwater acoustic countermeasure bullets has a significant influence on the reli-ability of the bullet. A dynamic simulation model of water entry impact is established by arbitrary Lagrange-Euler(ALE) algorithm. The feasibility of the simulation is verified by an experiment of a spherical bullet entering into water. Fur-thermore, numerical simulations of water entry impact of underwater acoustic countermeasure bullets are conducted in different conditions to analyze the cavitation, the bullet motion and the shock response of shell, which are caused by the water entry impact of the bullet. The results show that the cavitation is significantly influenced by the shape of bullets; the bullet speed exhibits high attenuation characteristic at the early stage of water entry; with the water entry angle in-creasing, the stability of bullet entering into water enhances, but the axial impact resistance gets larger; compared to the aluminum shell, buffering effect of the plastic shell on the water entry impact of the bullet is larger.

     

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