Dissipative Mechanisms in Floating Breakwaters: A Physical Model Study
Floating breakwaters are extensively employed in marinas and small craft facilities globally, primarily in sheltered areas to protect port basins from short-period waves. However, as climate change intensifies along with increased coastal risk, the question arises on how to extend housing and econom...
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| Tipo de recurso: | tesis de maestría |
| Fecha de publicación: | 2024 |
| País: | España |
| Institución: | Universitat Politècnica de Catalunya (UPC) |
| Repositorio: | UPCommons. Portal del coneixement obert de la UPC |
| Idioma: | inglés |
| OAI Identifier: | oai:upcommons.upc.edu:2117/425763 |
| Acceso en línea: | https://hdl.handle.net/2117/425763 |
| Access Level: | acceso abierto |
| Palabra clave: | Breakwaters, Mobile Ocean wave power floating breakwaters wave energy dissipation Tesla valve mooring forces motion response wave transmission coefficient wave reflection coefficient wave dissipation coefficient Espigons (Obres públiques) Onades--Energia Àrees temàtiques de la UPC::Enginyeria civil::Enginyeria hidràulica, marítima i sanitària::Ports i costes |
| Sumario: | Floating breakwaters are extensively employed in marinas and small craft facilities globally, primarily in sheltered areas to protect port basins from short-period waves. However, as climate change intensifies along with increased coastal risk, the question arises on how to extend housing and economic activities seaward using large-scale floating systems; not to mention the rapid growth in maritime international trade, which will require more and larger protected spaces in deep water. Floating breakwaters offer advantages over fixed-bottom structures due to their rapid installation, costeffectiveness at increased water depths, enhanced water circulation, less dependence on local soil conditions and climate change adaptation. They also serve as effective temporary storm protection structures. Despite these benefits, floating breakwaters remain ineffective against long-period waves. Research indicates that increasing the breakwater’s width enhances wave attenuation, but practical constraints limit the width to manageable dimensions (≤ 10m) for effective dampening of long waves (T > 5s). This study presents experimental findings on innovative floating breakwaters employing various dissipation mechanisms to enhance wave attenuation against both short and long waves. The tested configurations include geometric modifications to traditional box-type breakwaters, movable components, and internal cavities. Notably, two novel concepts are introduced: the wave-return box and a floater inspired by the Tesla valve principle. The analyses encompass the study of wave transmission coefficients, reflection coefficients, dissipation coefficients, mooring forces and motion responses to assess the efficacy of the proposed designs. |
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