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Item Hydrodynamic analysis of an H-shaped pile-restrained floating breakwater combined with a pair of vertical barriers(Elsevier Ltd, 2024) Panda, A.; Karmakar, D.; Rao, M.The present study analyses the performance of a composite breakwater consisting of an H-shaped breakwater attached with vertical/inclined barriers held from both sides using the Multi-Domain Boundary Element Method (MDBEM). The study is performed to analyse the wave transformation characteristics (reflection and transmission), wave energy dissipation and horizontal wave forces due to the gravity wave-structure interaction. The hydrodynamic performance of the integrated breakwater is performed due to the effect of changing various structural properties such as porosity, width and depth of structural elements, relative spacing between breakwater and barrier, angle of incidence and the inclination of the barriers. The boundary conditions and the corresponding edge conditions are incorporated for each surface and interface and correlated with Green's function to solve the boundary value problem. The detailed study proposes the suitable dimensions of the structural elements of the breakwater for optimal performance. The application of inclined barriers over the vertical barrier in certain conditions for maximising wave reflection is presented and analysed to understand the effectiveness of the barrier inclination. The favourable barrier dimensions and the suitable relative spacing for deep water regions are discussed, and the effect of rigidity and porosity of the barriers are analysed to maximise breakwater performance in wave attenuation. On considering the suitable design parameters and structural stability, the composition of vertical/inclined barriers with an H-shaped pile-restrained floating breakwater serves as a protective component by encountering maximum wave force and dissipating considerable wave energy to provide an efficient solution in harbour protection. © 2024 Elsevier LtdItem Oblique wave interaction with pile-restrained dual H-shaped breakwater(National Institute of Science Communication and Policy Research, 2024) Panda, A.; Karmakar, D.; Rao, M.The hydrodynamic performance of pile-restrained dual H-shaped floating breakwater is investigated using the small amplitude wave theory considering oblique wave incidence. The research on a single H-shaped floating structure supported by the piles has demonstrated effective wave reflection and wave trapping due to its distinctive configuration, composed of a vertical member called a web and a horizontal member called a flange. Thus, the dual H-shaped breakwater is proposed to enhance the breakwater’s efficiency and to provide additional support to the leeside structure. The present analysis is performed by varying the structural parameters such as the width and submergence draft of the web, flange width of the dual H-shaped breakwaters and the corresponding effect on the hydrodynamic coefficients along with the wave-induced force acting horizontally on the breakwater using Multi-Domain Boundary Element Method (MDBEM). Based on the study, the leeside structure experiences a greater wave force than the primary H-shaped structure placed seaside for the critical angle of incidence. The dual H-shaped breakwater is noted as a highly effective harbour defence solution based on the structural and design specifications. The dual H-shaped pile-restrained floating breakwaters provide protection by absorbing the highest wave force and releasing a significant quantity of wave energy. © 2024, National Institute of Science Communication and Policy Research. All rights reserved.