Dynamic response of cylindrical shell structures subjected to underwater explosion
Dynamic response of cylindrical shell structures subjected to underwater explosion
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DOI：
10.1016/j.oceaneng.2009.02.001
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发表时间：
2009-06
影响因子：
5
通讯作者：
C. Hung;B. Lin;J. J. Hwang-Fuu-J.;P. Hsu
中科院分区：
文献类型：
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作者：
C. Hung;B. Lin;J. J. Hwang-Fuu-J.;P. Hsu
研究了4 m × 4 m × 4 m水池中3个圆柱壳结构在水下小药量爆炸作用下的线性和非线性动力响应。圆柱壳结构尺寸为90cm×30cm×1mm（长×直径×厚）。圆柱形外壳的两端安装有厚板，以提供支撑并形成封闭的空间。三种圆柱壳结构分别为未加肋、内加肋和外加肋。对水下爆炸作用下圆柱体的动态响应进行了实验研究。使用少量炸药来产生冲击载荷。在小于50cm的间隔距离处观察到圆柱形壳体的塑性变形。对其他条件进行了测试，以检查圆柱体线性响应。对试验模型进行了有限元动力分析，并与试验结果进行了比较。将试验得到的圆柱壳的加速度和动应变与有限元分析结果进行了比较。最后，分析了在小水槽中进行小规模UNDEX实验的相关问题。
This study investigated the linear and nonlinear dynamic responses of three cylindrical shell structures subjected to underwater small charge explosions in a 4m×4m×4m water tank. The dimensions of the cylindrical shell structures were 90cm×30cm×1mm (length×diameter×thickness). Both ends of the cylindrical shell were mounted with thick plates to provide support and create an enclosed space. The three cylindrical shell structures were un-stiffened, internally stiffened and externally stiffened, respectively. The experiments involving the dynamic response of cylinders subjected to underwater explosion (UNDEX) were performed under different standoff distances, varying from 210 to 35cm. A small quantity of explosives was used to generate the shock loading. The plastic deformation of the cylindrical shell was observed at a standoff distance of less than 50cm. Other conditions were tested to examine cylinder linear response. Dynamic analyses were performed for the experimental model using FEM and compared with the test results. The accelerations and dynamic strains of cylindrical shells obtained from the experiment were compared with those obtained by FE analysis. Finally, problems related to small-scale UNDEX experiments performed in small water tanks were analyzed.