Ultimate Limit State Scour Risk Assessment of a Pentapod Suction Bucket Support Structure for Offshore Wind Turbine

Scour risk assessment considering reaction force at foundation was proposed and applied to newly developed pentapod suction bucket support structures for a 5.5 MW offshore wind turbine under ultimate limit state environmental load. Scour hazard was obtained according to scour depth by using an empir...

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Bibliographic Details
Published in:Energies (Basel) 2022-03, Vol.15 (6), p.2056
Main Authors: Kim, Young-Jin, Ngo, Duc-Vu, Lee, Jang-Ho, Kim, Dong-Hyawn
Format: Article
Language:English
Subjects:
Design
Earthquakes
Environmental conditions
Environmental hazards
Fragility
Investigations
Limit states
Marine environment
Offshore energy sources
Offshore operations
Offshore structures
offshore wind turbine
pentapod suction bucket
Probability distribution
Risk assessment
Scour
scour risk
Scouring
scouring fragility
Standard deviation
Suction
suction bucket
Turbines
Velocity
Wave height
Wind farms
Wind power
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Summary:Scour risk assessment considering reaction force at foundation was proposed and applied to newly developed pentapod suction bucket support structures for a 5.5 MW offshore wind turbine under ultimate limit state environmental load. Scour hazard was obtained according to scour depth by using an empirical formula, which is the function of marine environmental conditions such as significant wave height, significant period, and current velocity. Fragility of the pentapod support structure was evaluated using the bearing capacity limit state criterion under ultimate limit state load case. Scour risk was assessed by combining the scour hazard and the fragility. Finally, scour risk of the developed pentapod suction bucket support structure under ultimate limit state has been assessed.
ISSN:1996-1073
1996-1073
DOI:10.3390/en15062056