Hydrodynamic Interactions of the Truncated Porous Vertical Circular Cylinder With Water Waves

Volume 9: Offshore Geotechnics; Honoring Symposium for Professor Bernard Molin on Marine and Offshore Hydrodynamics Pub Date : 2018-06-17 DOI:10.1115/OMAE2018-78221

Charaf Ouled Housseine, Š. Malenica, G. D. Hauteclocque, Xiaobo Chen

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引用次数: 5

Abstract

Wave diffraction-radiation by a porous body is investigated here. Linear potential flow theory is used and the associated Boundary Value Problem (BVP) is formulated in frequency domain within a linear porosity condition. First, a semi-analytical solution for a truncated porous circular cylinder is developed using the dedicated eigenfunction expansion method. Then the general case of wave diffraction-radiation by a porous body with an arbitrary shape is discussed and solved through Boundary Integral Equation Method (BIEM). The main goal of these developments is to adapt the existing diffraction-radiation code (HYDROSTAR) for that type of applications. Thus the present study of the porous cylinder consists a validation work of (BIEM) numerical implementation. Excellent agreement between analytical and numerical results is observed. Porosity influence on wave exciting forces, added mass and damping is also investigated.

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截顶多孔垂直圆柱与水波的水动力相互作用

本文研究了多孔体的波衍射辐射。采用线性势流理论，在线性孔隙度条件下建立了相应的频域边值问题。首先，利用专用的特征函数展开法，得到了截形多孔圆柱的半解析解。然后讨论了任意形状多孔体的波衍射辐射的一般情况，并用边界积分方程法进行了求解。这些发展的主要目标是使现有的衍射辐射代码(HYDROSTAR)适应这种类型的应用。因此，本文对多孔圆柱体的研究是对BIEM数值实现的验证工作。分析结果与数值结果非常吻合。研究了孔隙度对波浪激振力、附加质量和阻尼的影响。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Volume 9: Offshore Geotechnics; Honoring Symposium for Professor Bernard Molin on Marine and Offshore Hydrodynamics

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