| 关于圆柱壳在水下爆炸冲击波作用下二次加载现象的数值模拟研究 |
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| 引用本文： | 张振华,朱锡,冯刚,方斌.关于圆柱壳在水下爆炸冲击波作用下二次加载现象的数值模拟研究[J].海军工程大学学报,2004,16(6):93-96. |
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| 作者姓名： | 张振华 朱锡 冯刚 方斌 |
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| 作者单位： | 海军工程大学,船舶与海洋工程系,湖北,武汉,430033 |
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| 摘 要： | 运用大型商业有限元程序MSC.DYTRAN数值模拟了水下爆炸冲击波载荷作用下自由环肋圆柱壳的非线性动态响应.采用一般耦合算法(generalcoupling)模拟流体与结构的耦合效应,计算中考虑了材料的应变率强化效应,几何非线性的影响,分析了空穴现象的产生和二次加载对结构响应的影响.仿真结果表明,相同工况和厚度下的无限自由平板和自由环肋圆柱壳,后者的空化时间比前者长,而壳体运动的最大速度后者比前者低.
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| 关 键 词： | 水下爆炸 环肋圆柱壳 动态响应 二次加载 |
| 文章编号： | 1009-3486(2004)06-0093-04 |
| 修稿时间： | 2004年6月3日 |
Nonlinear transient dynamic response of free-free ring-stiffened cylindrical shell subjected to underwater explosion shock wave |
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| ZHANG Zhen-hua,ZHU Xi,FENG Gang,FANG Bin.Nonlinear transient dynamic response of free-free ring-stiffened cylindrical shell subjected to underwater explosion shock wave[J].Journal of Naval University of Engineering,2004,16(6):93-96. |
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| Authors: | ZHANG Zhen-hua ZHU Xi FENG Gang FANG Bin |
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| Abstract: | The numerical investigation is carried out on the free-free ring-stiffened cylindrical shell subjected to underwater explosion shock wave by using MSC. DYTRAN finite element code. The general coupling is used to simulate the fluid-shell interaction. The strain rate effect, geometric nonlinear and initial geometric imperfection are considered. The effect of cavitation and second shock (loading on the response of structure are analyzed. ) |
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| Keywords: | underwater blast ring-stiffened cylindrical shell dynamic response second shock (loading) |
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