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<p>As an important damage element of missile attack, fragments will cause serious damage to warship structure and personnel. The protective liquid tank has a remarkable effect of absorbing fragments, which is an important protective means for warship defense against deep attack of fragments. In the present paper, the experiments of cylindrical and hemispherical fragments penetrating into the tank are carried out, and the pressure propagation law in the liquid and the structural failure mode of the tank are analyzed. Moreover, two kinds of numerical simulation models of fragment penetration into the protective tank are established by ALE method, and the reliability of numerical simulation is verified by fragment penetration test. Combined with numerical method, the effects of different velocities, warhead shapes and incident angles on the penetration of cylindrical fragments into liquid storage tanks are further discussed. The results show that the greater the incident velocity of fragments, the stronger the erosion by water. When the fragment penetrates at the incident angle of 45°, the protection effect of the tank is the worst.</p>

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Analysis on mechanism and damage mode of cylindrical fragments penetrating into protective tank: fragment penetration test and numerical simulation

  • 期刊论文

  • 发表日期：

    2025年3月21日

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  • Shuangxi Xu,
  • Mohan Liu,
  • Junliu Yang,
  • Yigang Wu,
  • Wei Shen,
  • Mengzhen Li

摘要

As an important damage element of missile attack, fragments will cause serious damage to warship structure and personnel. The protective liquid tank has a remarkable effect of absorbing fragments, which is an important protective means for warship defense against deep attack of fragments. In the present paper, the experiments of cylindrical and hemispherical fragments penetrating into the tank are carried out, and the pressure propagation law in the liquid and the structural failure mode of the tank are analyzed. Moreover, two kinds of numerical simulation models of fragment penetration into the protective tank are established by ALE method, and the reliability of numerical simulation is verified by fragment penetration test. Combined with numerical method, the effects of different velocities, warhead shapes and incident angles on the penetration of cylindrical fragments into liquid storage tanks are further discussed. The results show that the greater the incident velocity of fragments, the stronger the erosion by water. When the fragment penetrates at the incident angle of 45°, the protection effect of the tank is the worst.