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Open AccessArticle

Numerical Analysis of Combined Wave Radiation and Diffraction on a Floating Barge

1
Research Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhen Jiang 212013, China
2
Key Laboratory (Fluid Machinery and Engineering Research Base) of Sichuan Province, Xihua University, Sichuan 610039, China
*
Author to whom correspondence should be addressed.
Water 2020, 12(1), 205; https://doi.org/10.3390/w12010205
Received: 21 October 2019 / Revised: 24 December 2019 / Accepted: 7 January 2020 / Published: 11 January 2020
(This article belongs to the Section Hydraulics)
A two-dimensional boundary element method (BEM) based on the potential flow theory is adopted to study the combined wave radiation and diffraction by a single barge. The wave-body interaction problems are simulated using a mixed Euler-Lagrangian scheme, with fully nonlinear boundary conditions. The numerical schemes are verified through comparing with existing results, which show that both the wave runups on the barge and hydrodynamic forces can be calculated with sufficient accuracy. Cases of a single barge subjected to sway motion and regular waves are studied. The real contribution of this study is the outcomes of the spectral analysis conducted for test cases when wave radiation effects are considered in addition to pure wave diffraction. The cases of sway motion with the same frequency as incident wave are simulated first. It is found that sway motion will reduce the overall horizontal force when the frequency is lower than a critical frequency. After that, the higher the frequency, the bigger the horizontal force increasing effect. When the frequency of sway motion is lower than that of incident wave, in terms of the magnitude of the horizontal force, sway motion of the body will always make the resultant force larger than that of pure diffraction case. View Full-Text
Keywords: wave–structure interaction; boundary element method; potential flow theory; numerical wave tank wave–structure interaction; boundary element method; potential flow theory; numerical wave tank
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MDPI and ACS Style

Li, Y.; Xu, B.; Zhang, D.; Shen, X.; Zhang, W. Numerical Analysis of Combined Wave Radiation and Diffraction on a Floating Barge. Water 2020, 12, 205.

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