飞片撞击冲击波载荷在液舱中的弥散效应

Dispersion effect of fragment-induced shockwave in liquid tank

    摘要
  • 摘要:
      目的  大型水面舰船舷侧受反舰武器攻击威胁较大，通常设置多舱防护结构以保证内部重要舱室的安全。为研究多舱防护结构中飞片撞击冲击波载荷在液舱中的弥散效应，
      方法  首先开展爆轰驱动飞片作用小型液舱的机理性试验，获得液舱中典型位置的自由场压力等试验数据；然后基于试验结果验证本文采用的数值仿真方法；最后，计算实尺度舷侧防护结构中液舱对飞片撞击产生的压力波载荷的弥散作用。
      结果  结果显示，在液舱中，压力波的压力峰值和冲量随空间位置变化满足指数衰减规律。
      结论   研究成果对舷侧防护结构的优化设计有一定的参考价值。

     

    Abstract:
      Objectives  The shipboards of large surface ships are greatly threatened by anti-ship weapons, and a multicamerate defense structure (MDS) is usually established to ensure the safety of important internal cabins. In this paper, the dispersion effect of fragment-induced shockwaves in an MDS liquid tank is studied.
      Methods  First, the elemental experiment of a miniature liquid tank struck by fragments is conducted, through which the free field pressure, etc. of typical positions in the tank are obtained. The numerical method used in this paper is then validated on the basis of the experimental results and the dispersion effects in a full-scale MDS liquid tank are analyzed.
      Results  It is found that the amplitude and impulses of shockwaves in a liquid tank satisfy the exponential attenuation law as the spatial position changes.
      Conclusions   The findings of this paper can provide useful references for the optimal design of MDS.

     

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