| 细长壳体水声辐射问题的有限元结合边界元解法 |
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| 引用本文： | 周其斗. 细长壳体水声辐射问题的有限元结合边界元解法[J]. 海军工程大学学报, 1996, 0(2) |
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| 作者姓名： | 周其斗 |
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| 摘 要： | 采用三角形面积元，提出了一种计算任意形状的细长壳体水声辐射问题的有限元结合边界元解法，推导了三角形面积坐标下的质量矩阵。在水动力方面，根据单层势的概念，提出了声场速度势的边界积分表示式，给出了三角形面积坐标下的附加质量矩阵和附加阻尼矩阵，从而得以建立流固耦合的有限元动力响应方程。本方法的进一步发展可用于计算具有加强肋骨的双层壳体结构的声辐射问题以及船体在随机激励下的远场声功率谱。
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| 关 键 词： | 水声学；水弹性力学；有限元；振动；计算力学 |
Coupled Finite Element - Boundary Integral Method for Acoustic Radiation from Slender Shell |
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| Zhou Qidou. Coupled Finite Element - Boundary Integral Method for Acoustic Radiation from Slender Shell[J]. Journal of Naval University of Engineering, 1996, 0(2) |
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| Authors: | Zhou Qidou |
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| Abstract: | A method of structural finite element and fluid boundaly element is presented for predicting the vibration and sound radiation from submerged slender shell. A feature of the methodologies implemented is the utilization of triangular area element from finite element theory. In hydrodynamic aspect, monopole potential concept is employed to express potential of acoustic field. Under triangular area coordinates, panel added - mass and damping matrices are introduced so that coupled dynamic response equation can be established.The method can be extended and applied to complex shell sturcture under stochastic force. |
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| Keywords: | Acoustics Hydroelastics Finite etement Vibration Numerical mechanics |
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