水下爆炸气泡载荷在加筋板塑性变形中的作用

牟金磊;朱 锡;黄晓明;李海涛

振动与冲击 ›› 2010, Vol. 29 ›› Issue (5) : 74-77.

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PDF(1076 KB)
振动与冲击 ›› 2010, Vol. 29 ›› Issue (5) : 74-77.
论文

水下爆炸气泡载荷在加筋板塑性变形中的作用

  • 牟金磊;朱 锡;黄晓明;李海涛
作者信息 +

THE PLASTIC DISPLACEMENT OF STIFFENED PLATES INDUCED BY UNDERWATER EXPLOSION BUBBLE

  • MU Jin-lei;ZHU Xi;HUANG Xiao-ming;LI Hai-tao
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摘要

水下爆炸产生的冲击波载荷和气泡载荷都会对水中结构产生毁伤作用。为研究水下爆炸气泡载荷在加筋板塑性变形挠度中所占的比例,利用通用有限元软件Abaqus/Explicit对加筋板模型在水下爆炸载荷作用下的动态响应进行了一系列数值仿真。载荷计算采用了Geers-Hunter模型,材料本构采用了Johnson-Cook模型,将部分计算工况与试验结果比较,两者吻合较好。通过分析计算结果可以看出在气泡载荷在加筋板塑性变形中的比重主要受爆距影响,爆距越小,所起的作用越大。所以,在水下近场爆炸计算中,气泡载荷引起的塑性变形不容忽视。

Abstract

Both the shock wave and the bubble load from underwater explosion can destroy the structures. In order to study the plastic displacement of the stiffened plates subjected to underwater explosion bubble, the dynamic plastic response of the model were simulated by using FEM software Abaqus/Explicit. The underwater explosion load was calculated by use of the Geers-Hunter model. The material was simulated by Johnson-Cook conditions. The simulation results were coincident with the experimental ones. The results show that the effect to the plastic displacement of the stiffened plates subjected to underwater explosion bubble relates to the standoff distance. In the near field explosion, the effect of the bubble is more important. Therefore, the plastic displacement induced by bubble load can’t be neglected in the near field explosion.

关键词

水下爆炸 / 气泡载荷 / 加筋板 / 数值仿真

Key words

underwater explosion / bubble load / stiffened plates / numerical simulation

引用本文

导出引用
牟金磊;朱 锡;黄晓明;李海涛. 水下爆炸气泡载荷在加筋板塑性变形中的作用[J]. 振动与冲击, 2010, 29(5): 74-77
MU Jin-lei;ZHU Xi;HUANG Xiao-ming;LI Hai-tao. THE PLASTIC DISPLACEMENT OF STIFFENED PLATES INDUCED BY UNDERWATER EXPLOSION BUBBLE[J]. Journal of Vibration and Shock, 2010, 29(5): 74-77

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