Articles | Volume 7, issue 1
https://doi.org/10.5194/wes-7-259-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/wes-7-259-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
A fully integrated optimization framework for designing a complex geometry offshore wind turbine spar-type floating support structure
Mareike Leimeister
CORRESPONDING AUTHOR
Naval Architecture, Ocean and Marine Engineering, University of Strathclyde, 100 Montrose Street, Glasgow G4 0LZ, United Kingdom
Division System Technology, Fraunhofer Institute for Wind Energy Systems IWES, Am Luneort 100, 27572 Bremerhaven, Germany
Maurizio Collu
Naval Architecture, Ocean and Marine Engineering, University of Strathclyde, 100 Montrose Street, Glasgow G4 0LZ, United Kingdom
Athanasios Kolios
Naval Architecture, Ocean and Marine Engineering, University of Strathclyde, 100 Montrose Street, Glasgow G4 0LZ, United Kingdom
Related authors
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Katarzyna Patryniak, Maurizio Collu, Jason Jonkman, Matthew Hall, Garrett Barter, Daniel Zalkind, and Andrea Coraddu
Wind Energ. Sci., 10, 2051–2077, https://doi.org/10.5194/wes-10-2051-2025, https://doi.org/10.5194/wes-10-2051-2025, 2025
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This paper studies the instantaneous centre of rotation (ICR) of floating offshore wind turbines (FOWTs). We present a method for computing the ICR and examine the correlations between the external loading, design features, ICR statistics, motions, and loads. We demonstrate how to apply the new insights to successfully modify the designs of the spar and semisubmersible FOWTs to reduce the loads in the moorings, the tower, and the blades, improving the ultimate strength and fatigue properties.
Büsra Yildirim, Nikolay Dimitrov, Athanasios Kolios, and Asger Bech Abrahamsen
Wind Energ. Sci. Discuss., https://doi.org/10.5194/wes-2025-115, https://doi.org/10.5194/wes-2025-115, 2025
Preprint under review for WES
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A surrogate-based design optimization framework has been implemented for a floating wind turbine. By integrating surrogate modeling and analytical design constraints, computationally efficient exploration of design spaces is ensured. This integration provides a connection between conceptual and detailed design. The proposed methodology achieved a reduction of 3.7 % in the Levelized Cost of Energy, considering ultimate, fatigue, and serviceability limit states.
Azélice Ludot, Thor Heine Snedker, Athanasios Kolios, and Ilmas Bayati
Wind Energ. Sci. Discuss., https://doi.org/10.5194/wes-2024-162, https://doi.org/10.5194/wes-2024-162, 2025
Preprint under review for WES
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This paper presents a methodology to develop machine learning models designed to predict, in real-time, hourly fatigue damage accumulation in the mooring lines of floating wind turbines, from measurements of five environmental variables: wind speed, wind direction, wave height, wave period, and wind-wave misalignment. The proposed tool is intended for predictive maintenance applications, which has been identified as a key area for cost reduction in floating wind.
Claudio Alexis Rodríguez Castillo, Baran Yeter, Shen Li, Feargal Brennan, and Maurizio Collu
Wind Energ. Sci., 9, 533–554, https://doi.org/10.5194/wes-9-533-2024, https://doi.org/10.5194/wes-9-533-2024, 2024
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A detailed review of ocean renewable systems, with focus on offshore wind, for the offshore production of green fuels was conducted. Engineering tools and methodologies and their suitability for the design and operation of offshore H2 systems were reviewed. Distinct from wind electricity generation, the support platforms for offshore H2 systems involve additional requirements and constraints. Challenges and opportunities for the offshore H2 systems are discussed.
Adebayo Ojo, Maurizio Collu, and Andrea Coraddu
Wind Energ. Sci. Discuss., https://doi.org/10.5194/wes-2023-96, https://doi.org/10.5194/wes-2023-96, 2023
Revised manuscript not accepted
Short summary
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This is a nouvelle work conducted to aid the expedition of the Floating Offshore Wind Turbine (FOWT) technology to be as commercially viable as the fixed bottom foundation counterpart. This work is focused on the shape alteration of the FOWT platform within an optimization framework to reduce the cost of material for manufacturing the platforms; therefore, reducing the levelized cost of energy. This study also shows economics of scale further reduces the LCOE when the farm's size is increased.
Innes Murdo Black, Moritz Werther Häckell, and Athanasios Kolios
Wind Energ. Sci. Discuss., https://doi.org/10.5194/wes-2022-93, https://doi.org/10.5194/wes-2022-93, 2022
Revised manuscript accepted for WES
Short summary
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Population based structural health monitoring is a low-cost monitoring campaign. The cost reduction from this type of digital enabled asset management tool is manifested by sharing information, in this case a wind farm foundation, within the population. By sharing the information in the wind farm this reduces the amount of sensors and physical model updating, reducing the cost of the monitoring campaign.
Peyman Amirafshari, Feargal Brennan, and Athanasios Kolios
Wind Energ. Sci., 6, 677–699, https://doi.org/10.5194/wes-6-677-2021, https://doi.org/10.5194/wes-6-677-2021, 2021
Short summary
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One particular problem with structures operating in seas is the so-called fatigue phenomenon. Cyclic loads imposed by waves and winds can cause structural failure after a number of cycles. Traditional methods have some limitations.
This paper presents a developed design framework based on fracture mechanics for offshore wind turbine support structures which enables design engineers to maximise the use of available inspection capabilities and optimise the design and inspection, simultaneously.
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Short summary
Floating offshore wind technology has high potential but still faces challenges for gaining economic competitiveness to allow commercial market uptake. Hence, design optimization plays a key role; however, the final optimum floater obtained highly depends on the specified optimization problem. Thus, by considering alternative structural realization approaches, not very stringent limitations on the structure and dimensions are required. This way, more innovative floater designs can be captured.
Floating offshore wind technology has high potential but still faces challenges for gaining...
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