Rigid moorings in shallow water: A wave power application. Part I: Experimental verification of methods
Experimental work carried out at 1:60 scale in a wave flume assessed the pitch motion and anchor loading of 3 articulated tower installations in 50 m water depth while being exposed to north Atlantic storms with Hs of 15.2 m and Tp of 18.4 s. The three installations differ only in that their mass an...
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Online Access: | https://doi.org/10.1016/j.marstruc.2009.09.002 https://research.chalmers.se/en/publication/102354 |
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ftchalmersuniv:oai:research.chalmers.se:102354 2023-05-15T17:35:00+02:00 Rigid moorings in shallow water: A wave power application. Part I: Experimental verification of methods Fitzgerald, John Bergdahl, Lars 2009 text https://doi.org/10.1016/j.marstruc.2009.09.002 https://research.chalmers.se/en/publication/102354 unknown http://dx.doi.org/10.1016/j.marstruc.2009.09.002 https://research.chalmers.se/en/publication/102354 Mechanical Engineering Earth and Related Environmental Sciences Shallow water Moorings Articulated Tower Wave energy 2009 ftchalmersuniv https://doi.org/10.1016/j.marstruc.2009.09.002 2022-12-11T06:50:45Z Experimental work carried out at 1:60 scale in a wave flume assessed the pitch motion and anchor loading of 3 articulated tower installations in 50 m water depth while being exposed to north Atlantic storms with Hs of 15.2 m and Tp of 18.4 s. The three installations differ only in that their mass and buoyancy characteristics provide a natural period in pitch at equilibrium of 13 s, 20 s and 34 s respectively. It is verified that the dominant behaviour can be simulated by a relatively simple mathematical model, allowing the critical parameters of peak anchor loads and pitch angles to be calculated and extrapolated to full scale. It is demonstrated from the experimental and simulation results that the mass characteristics of a non surface piercing tower can be used to offset some of the challenges of moving to shallow water. If done correctly, it is possible to keep horizontal anchor loads under control and reduce vortex-induced transverse loading at the expense of increased pitch motions. Overall, the use of articulated tower installations in water depths of 50 m would appear to be technically feasible, even in exposed areas. The limitations on the size of such structures and the consequences of the resulting pitch accelerations and induced anchor loads are the subject of further study. It is proposed that the model verified herein can be used to further assess their potential at delivering viable wave power position mooring systems. Other/Unknown Material North Atlantic Chalmers University of Technology: Chalmers research Marine Structures 22 4 809 835 |
institution |
Open Polar |
collection |
Chalmers University of Technology: Chalmers research |
op_collection_id |
ftchalmersuniv |
language |
unknown |
topic |
Mechanical Engineering Earth and Related Environmental Sciences Shallow water Moorings Articulated Tower Wave energy |
spellingShingle |
Mechanical Engineering Earth and Related Environmental Sciences Shallow water Moorings Articulated Tower Wave energy Fitzgerald, John Bergdahl, Lars Rigid moorings in shallow water: A wave power application. Part I: Experimental verification of methods |
topic_facet |
Mechanical Engineering Earth and Related Environmental Sciences Shallow water Moorings Articulated Tower Wave energy |
description |
Experimental work carried out at 1:60 scale in a wave flume assessed the pitch motion and anchor loading of 3 articulated tower installations in 50 m water depth while being exposed to north Atlantic storms with Hs of 15.2 m and Tp of 18.4 s. The three installations differ only in that their mass and buoyancy characteristics provide a natural period in pitch at equilibrium of 13 s, 20 s and 34 s respectively. It is verified that the dominant behaviour can be simulated by a relatively simple mathematical model, allowing the critical parameters of peak anchor loads and pitch angles to be calculated and extrapolated to full scale. It is demonstrated from the experimental and simulation results that the mass characteristics of a non surface piercing tower can be used to offset some of the challenges of moving to shallow water. If done correctly, it is possible to keep horizontal anchor loads under control and reduce vortex-induced transverse loading at the expense of increased pitch motions. Overall, the use of articulated tower installations in water depths of 50 m would appear to be technically feasible, even in exposed areas. The limitations on the size of such structures and the consequences of the resulting pitch accelerations and induced anchor loads are the subject of further study. It is proposed that the model verified herein can be used to further assess their potential at delivering viable wave power position mooring systems. |
author |
Fitzgerald, John Bergdahl, Lars |
author_facet |
Fitzgerald, John Bergdahl, Lars |
author_sort |
Fitzgerald, John |
title |
Rigid moorings in shallow water: A wave power application. Part I: Experimental verification of methods |
title_short |
Rigid moorings in shallow water: A wave power application. Part I: Experimental verification of methods |
title_full |
Rigid moorings in shallow water: A wave power application. Part I: Experimental verification of methods |
title_fullStr |
Rigid moorings in shallow water: A wave power application. Part I: Experimental verification of methods |
title_full_unstemmed |
Rigid moorings in shallow water: A wave power application. Part I: Experimental verification of methods |
title_sort |
rigid moorings in shallow water: a wave power application. part i: experimental verification of methods |
publishDate |
2009 |
url |
https://doi.org/10.1016/j.marstruc.2009.09.002 https://research.chalmers.se/en/publication/102354 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
http://dx.doi.org/10.1016/j.marstruc.2009.09.002 https://research.chalmers.se/en/publication/102354 |
op_doi |
https://doi.org/10.1016/j.marstruc.2009.09.002 |
container_title |
Marine Structures |
container_volume |
22 |
container_issue |
4 |
container_start_page |
809 |
op_container_end_page |
835 |
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1766134020592107520 |