FOWT Stability Study According to Number of Columns Considering Amount of Materials Used

Ho-Seong Yang, Ali Alkhabbaz, Dylan Sheneth Edirisinghe, Watchara Tongphong and Young-Ho Lee
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Ho-Seong Yang: Department of Mechanical Engineering, Korea Maritime and Ocean University, Busan 49112, Korea
Ali Alkhabbaz: Department of Mechanical Engineering, Korea Maritime and Ocean University, Busan 49112, Korea
Dylan Sheneth Edirisinghe: Department of Mechanical Engineering, Korea Maritime and Ocean University, Busan 49112, Korea
Watchara Tongphong: Department of Mechanical Engineering, Korea Maritime and Ocean University, Busan 49112, Korea
Young-Ho Lee: Department of Mechanical Engineering, Korea Maritime and Ocean University, Busan 49112, Korea

Energies, 2022, vol. 15, issue 5, 1-24

Abstract: Considering stability and fabrication cost, 3–4 columns are usually adopted for semi-submersible platform designs. Although increasing the number of columns provides more stability for both floating platform and system as a whole, it is generally not economically viable. In this respect, the present work provides a high-fidelity analysis of semi-submersible platform stability and hydrodynamic response for different design concepts. The number of columns was considered as the main design parameter and was varied from 3–6 columns. The semi-submersible weight was kept constant during the simulation period by changing the column diameter and amount of ballast water. The investigation was carried out using the potential code Orcawave, the results of which were input directly to the engineering tool OrcaFlex. Four different types of semi-submersible platforms with a varying number of columns were tested and compared under extreme environmental conditions in order to ensure their stability and hydrodynamic response. The simulation findings revealed that platform stability was more affected by the geometrical features of the floater than by the number of columns. Furthermore, the number of columns did not have a significant impact on hydrodynamic behavior for the same platform geometry.

Keywords: floating offshore wind turbine (FOWT); semi-submersible; OrcaFlex; ansys aqwa; extreme condition; fully-coupled analysis; stability analysis (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (5)

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