| 基于BEM/FEM计算浸水结构振动特性 |
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| 引用本文： | 安小同,洪明,李艮田.基于BEM/FEM计算浸水结构振动特性[J].船海工程,2011,40(6):55-58. |
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| 作者姓名： | 安小同 洪明 李艮田 |
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| 作者单位： | 1. 大连理工大学船舶工程系,大连,116024
2. 交通部上海打捞局,上海,200090 |
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| 基金项目： | 国家自然科学基金(51079027) |
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| 摘 要： | 应用直接边界元和有限元方法分析水下结构体的固有频率和振动特性,根据边界元理论编译出相应的程序来计算水下结构的附加质量矩阵,将附加质量矩阵与现有的有限元程序相结合,分析水下结构体的固有频率和振动特性,以浸没于流体介质中的圆柱壳为例,通过与近似理论值的对比验证了数值计算结果的可靠性,表明流体介质改变了结构的振动特性.
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| 关 键 词： | 直接边界元 有限元 固有频率 附加质量矩阵 圆柱壳 |
Vibration Characteristic of an Immersed Structure by BEM/FEM |
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| Authors: | AN Xiao-tong HONG Ming LI Gen-tian |
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| Institution: | 1 School of Naval Architecture and Ocean Engineering,Dalian University of Technology,Dalian Liaoning 116024,China; 2 Shanghai Salvage Bureau,Shanghai 200090,China) |
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| Abstract: | A direct-BEM/FEM was proposed to analyze the natural vibration frequencies and vibration characteristics of a submerged structure.The program base on boundary element approach was used to compute the added mass matrix of the structure.Coupled the added mass matrix with the finite element techniques,the natural frequencies and vibration characteristics was finally obtained.Numerical result of a submerged cylindrical shell model is compared with the approximate theoretical result and the validity of the program is verified.It shows that heavy fluid changes greatly structural vibration behavior. |
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| Keywords: | direct boundary element method finite element method natural frequencies added mass matrix cylindrical shell |
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