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- Title
Load analysis and structural strength evaluation of semi-submersible platform for wind turbines in Jeju Island sea states using hydrodynamic-structure interaction analysis.
- Authors
Lee, Dong-Chan; Cho, Seunghyeon; Yang, Hyun-ik; Na, Sang-kwon; Kim, Chang-wan
- Abstract
The present study conducted an analysis of waves and wind on the west coast of Jeju Island in South Korea to derive the loads for a structural analysis under operational, extreme, and survival conditions and then evaluated the structural strength of the DeepCwind semi-submersible platform of NREL for 5 MW wind turbine. As a floating structure is exposed to wind and wave loads in a highly changeable marine environment and consists of tubular joints with slender-element members, a load analysis is necessary for strength evaluation and design of the structure. The wave scatter diagrams based on KORDI's 24-year measurements of sea states and the annual mean wind speeds were used as the operational conditions. A sea state with a period that is very likely to cause the resonance of a floating structure was applied as the extreme condition. Another sea state during the Bolaven, a typhoon passing west of Jeju Island in 2000, is adopted as the survival condition. The surface pressure distribution of DeepCwind calculate through hydrodynamic analysis was applied to a structural analysis model based on a hydrodynamic-structure interaction analysis. The evaluation of the structural strength is performed in accordance with the provisions of DNV-OS-C201 and API-2A-WSD under operational, extreme, and survival conditions.
- Subjects
CHEJU Island (Korea); SOUTH Korea; WIND turbines; OCEAN waves; TYPHOONS; SURFACE pressure; WIND pressure; SCATTER diagrams; SCATTERING (Physics)
- Publication
Journal of Mechanical Science & Technology, 2020, Vol 34, Issue 3, p1227
- ISSN
1738-494X
- Publication type
Article
- DOI
10.1007/s12206-020-0221-5