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| Content Provider | The American Society of Mechanical Engineers (ASME) Digital Collection |
|---|---|
| Author | Bush, Erica Manuel, Lance |
| Copyright Year | 2009 |
| Abstract | The objective of this study is to investigate the effect of alternative monopile foundation models for shallow-water offshore wind turbines on extreme loads associated with 20-year return periods. Foundation models with tower base fixed at the mudline, with apparent fixity points below the mudline, with coupled transverse and lateral springs at the mudline, and with distributed springs over the entire penetration depth of the monopile are compared. We employ a utility-scale 5 MW offshore wind turbine model with a 90-meter hub height in stochastic simulations; the turbine is sited in 20 meters of water. Selected 20-year wind speed and wave height combinations are employed as we study comparative response statistics, power spectra, and probability distributions of extreme loads for the fixed-base and the three different flexible foundation models. A discussion on the varying dynamics, on short-term response statistics, and on extrapolated long-term loads from limited simulation is presented. Sea states involving wind speeds close to the turbine’s rated wind speed are found to control 20-year loads, and the flexible foundation models are found to experience higher extreme loads than the fixed-based case. Overall, the three flexible foundation models appear to yield similar long-term loads based on an Inverse FORM (First-Order Reliability Method) approach for the selected turbine and soil profile used in this study. |
| Sponsorship | Ocean, Offshore and Arctic Engineering Division |
| Starting Page | 1075 |
| Ending Page | 1083 |
| Page Count | 9 |
| File Format | |
| ISBN | 9780791843444 |
| DOI | 10.1115/OMAE2009-80050 |
| e-ISBN | 9780791838440 |
| Volume Number | Volume 4: Ocean Engineering; Ocean Renewable Energy; Ocean Space Utilization, Parts A and B |
| Conference Proceedings | ASME 2009 28th International Conference on Ocean, Offshore and Arctic Engineering |
| Language | English |
| Publisher Date | 2009-05-31 |
| Publisher Place | Honolulu, Hawaii, USA |
| Access Restriction | Subscribed |
| Subject Keyword | Water Seas Wind velocity Statistics as topic Modeling Waves Stress Simulation Spectra (spectroscopy) Dynamics (mechanics) Statistical distributions Offshore wind turbines Soil Reliability Springs Turbines |
| Content Type | Text |
| Resource Type | Article |
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