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China Ocean Engineering

, Volume 33, Issue 1, pp 1–13 | Cite as

Study on Rigid-Flexible Coupling Effects of Floating Offshore Wind Turbines

  • Jia-hao Chen
  • Zhi-qiang HuEmail author
  • Ge-liang Liu
  • De-cheng Wan
Article
  • 12 Downloads

Abstract

In order to account for rigid-flexible coupling effects of floating offshore wind turbines, a nonlinear rigid-flexible coupled dynamic model is proposed in this paper. The proposed nonlinear coupled model takes the higher-order axial displacements into account, which are usually neglected in the conventional linear dynamic model. Subsequently, investigations on the dynamic differences between the proposed nonlinear dynamic model and the linear one are conducted. The results demonstrate that the stiffness of the turbine blades in the proposed nonlinear dynamic model increases with larger overall motions but that in the linear dynamic model declines with larger overall motions. Deformation of the blades in the nonlinear dynamic model is more reasonable than that in the linear model as well. Additionally, more distinct coupling effects are observed in the proposed nonlinear model than those in the linear model. Finally, it shows that the aerodynamic loads, the structural loads and global dynamic responses of floating offshore wind turbines using the nonlinear dynamic model are slightly smaller than those using the linear dynamic model. In summary, compared with the conventional linear dynamic model, the proposed nonlinear coupling dynamic model is a higher-order dynamic model in consideration of the rigid-flexible coupling effects of floating offshore wind turbines, and accord more perfectly with the engineering facts.

Key words

floating offshore wind turbine dynamic stiffening effect nonlinear coupled dynamic model DARwind 

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Notes

Acknowledgements

This work was supported by the State Key Lab of Ocean Engineering, Shanghai Jiao Tong University, and all of these supports are gratefully acknowledged by the authors.

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Copyright information

© Chinese Ocean Engineering Society and Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  • Jia-hao Chen
    • 1
    • 3
  • Zhi-qiang Hu
    • 2
    Email author
  • Ge-liang Liu
    • 1
  • De-cheng Wan
    • 1
    • 3
  1. 1.State Key Laboratory of Ocean EngineeringShanghai Jiao Tong UniversityShanghaiChina
  2. 2.School of EngineeringNewcastle UniversityNewcastle upon TyneUK
  3. 3.Collaborative Innovation Center for Advanced Ship and Deep-Sea ExplorationShanghai Jiao Tong UniversityShanghaiChina

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