Dynamic analysis of 10 MW monopile supported offshore wind turbine based on fully coupled model
| Autor: | Piguang Wang, Xiuli Du, Endi Zhai, Suyu Wang, Renqiang Xi, Chengshun Xu |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Environmental Engineering
Metocean Computer science Foundation (engineering) 020101 civil engineering Ocean Engineering Natural frequency 02 engineering and technology 01 natural sciences Turbine 010305 fluids & plasmas 0201 civil engineering Nonlinear system Offshore wind power Control theory Soil structure interaction 0103 physical sciences Marine engineering |
| Zdroj: | Ocean Engineering. 234:109346 |
| ISSN: | 0029-8018 |
| DOI: | 10.1016/j.oceaneng.2021.109346 |
| Popis: | In this study, the monopile of a 10 MW offshore wind turbine (OWT) is designed for a specific ocean site, and a new soil-structure interaction (SSI) framework is developed for the aero-servo-hydro-elastic code FAST. Taking the DTU 10 MW OWT as the prototype, a Bladed-style controller is developed to regulate the rotor speed and blade-pitch angle, and its performance is evaluated by comparisons with the DTU original controller. Subsequently, an SSI analysis model is established for FAST using the nonlinear Winkler foundation model, and this module is verified by the analysis results obtained from GL-Bladed software. In addition, the monopile of this 10 MW OWT is designed for layered sand adopting the metocean data from the North Sea. The soft-stiff design philosophy is used in this task, and the 1st-order natural frequency of the system is 0.22 Hz lying in the middle of 1P and 3P frequency bands of OWT. Besides, the dynamic response and fatigue damage of this 10 MW monopile supported OWT are investigated using the fully coupled model. The results show that SSI effect and time-variant blade-pitch angle significantly influence the dynamic response of OWT and fatigue life of the monopile. |
| Databáze: | OpenAIRE |
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