Dynamic analysis of 10 MW monopile supported offshore wind turbine based on fully coupled model

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.

• Record URL:
  https://doi.org/10.1016/j.oceaneng.2021.109346
• Record URL:
  http://www.sciencedirect.com/science/article/pii/S0029801821007629
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00298018
• Supplemental Notes:
  • © 2021 Elsevier Ltd. All rights reserved. Abstract reprinted with permission of Elsevier.
• Authors:
  • Xi, Renqiang
  • Du, Xiuli
  • 0000-0001-8594-7161
  • Wang, Piguang
  • Xu, Chengshun
  • Zhai, Endi
  • Wang, Suyu
• Publication Date: 2021-8-15

Language

• English

Media Info

• Media Type: Web
• Features: Figures; References; Tables;
• Serial:
  • Ocean Engineering
  • Volume: 234
  • Issue Number: 0
  • Publisher: Pergamon
  • ISSN: 0029-8018
  • EISSN: 1873-5258
  • Serial URL: http://www.sciencedirect.com/science/journal/00298018

Subject/Index Terms

• TRT Terms: Dynamic structural analysis; Offshore structures; Soil structure interaction; Support piles; Turbines; Wind power generation
• Geographic Terms: North Sea
• Subject Areas: Marine Transportation; Terminals and Facilities;

Filing Info

• Accession Number: 01777139
• Record Type: Publication
• Files: TRIS
• Created Date: Jul 23 2021 3:25PM