Numerical investigation of diffraction and radiation of surface gravity waves by a rectangular structure over a stepped bottom with and without a vertical wall

Mohapatra A.K.; Sahoo T.

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Numerical investigation of diffraction and radiation of surface gravity waves by a rectangular structure over a stepped bottom with and without a vertical wall

机译：Numerical investigation of diffraction and radiation of surface gravity waves by a rectangular structure over a stepped bottom with and without a vertical wall

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? 2022 Elsevier LtdA numerical investigation based on the boundary element method is conducted to analyze the effect of step bottom on the radiation of surface gravity wave by the rectangular marine structure under the assumption of a two-dimensional linearized water wave theory. The investigation is supplemented by analyzing the presence of a back wall located near the floating structure. The accuracy of the method is validated using the known special case of published results. Hydrodynamic coefficients such as added mass and damping coefficients and wave excitation force coefficients are evaluated in both cases. The influence of depth ratio and the distance of step from the center of the structure is calculated to understand the role of the stepped bottom on the hydrodynamic coefficients. On many occasions, these results are compared with the flat bottom case. The study results are helpful to understand the influence of the step-type bottom profile on the design of floating rectangular structures in various marine structure applications and wave energy converter devices.

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《Ocean engineering》 |2022年第4期|113007.1-113007.21|共21页
作者
Mohapatra A.K.; Sahoo T.;
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作者单位

Department of Ocean Engineering and Naval Architecture Indian Institute of Technology Kharagpur;

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原文格式 PDF
正文语种英语
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关键词
Added mass and damping coefficients; Boundary element method; Diffraction; Radiation; Rectangular buoy; Step bottom; Surface gravity wave; Vertical wall;

Numerical investigation of diffraction and radiation of surface gravity waves by a rectangular structure over a stepped bottom with and without a vertical wall

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