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Diffraction waves on large aspect ratio rectangular submerged breakwaters

Masoudi, Esmaeel; Gan, Lian

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In this paper, hydrodynamic characteristics of two-dimensional submerged breakwaters in water of finite depth and infinite domain interacting with sinusoidal waves are studied from both analytical and numerical approaches. Added mass and damping coefficients are obtained following the determination of radiation potentials in three degrees of freedom (sway, heave and roll). Diffraction problem is then solved according to the linear wave theory and the resulting forces are derived. To verify the results, a comparison of the solution from the analytical method with those obtained by the boundary element method is made and a good agreement is observed. Additionally, high aspect ratio horizontal and vertical flat submerged breakwaters are proposed and their hydrodynamic characteristics are analysed using the numerical and analytical methods. Results show that the horizontal flat submerged breakwater generates low transmitted waves. However, the vertical flat submerged breakwater transmits almost the entire incident wave energy. A parametric study on the effect of submergence depth and the width of the structure on the maximum diffraction wave amplitude, which is responsible for the transmitted wave energy, is carried out and a better understanding of the variation of diffraction wave amplitudes with respect to dominant parameters and wave frequency is achieved.


Masoudi, E., & Gan, L. (2020). Diffraction waves on large aspect ratio rectangular submerged breakwaters. Ocean Engineering, 209, Article 107474.

Journal Article Type Article
Acceptance Date Apr 29, 2020
Online Publication Date May 26, 2020
Publication Date Aug 1, 2020
Deposit Date May 28, 2020
Publicly Available Date May 26, 2021
Journal Ocean Engineering
Print ISSN 0029-8018
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 209
Article Number 107474


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