Dynamic mooring simulation with Code-Aster with application to a floating wind turbine

OCEAN ENGINEERING

卷:151

Article

Antonutti, Raffaello^1,2  Peyrard, Christophe^1,2  Incecik, Atilla^3,6  Ingram, David^4,6  Johanning, Lars^5,6 

[1] EDF R&D Elect France Res & Dev, 6 Quai Wader, F-78400 Chatou, France

[2] EDF R&D, St Venant Hydraul Lab, ENPC, CEREMA, 6 Quai Wader, F-78400 Chatou, France

[3] Univ Strathclyde, Dept Naval Architecture Ocean & Marine Engn, Glasgow G4 0LZ, Lanark, Scotland

[4] Univ Edinburgh, Sch Engn, Inst Energy Syst, Kings Bldg, Edinburgh EH9 3JL, Midlothian, Scotland

[5] Univ Exeter, Renewable Energy Res Grp, Coll Engn Math & Phys Sci, Penryn Campus, Penryn TR10 9EZ, England

[6] Univ Edinburgh, Ind Doctoral Ctr Offshore Renewable Energy, Kings Bldg, Edinburgh EH9 3JL, Midlothian, Scotland

关键词: Moorings;    Dynamics;    Finite-element;    Code Aster;    Floating wind;    OC4;   

DOI  :  10.1016/j.oceaneng.2017.11.018

来源: Elsevier

【 摘 要 】

The design of reliable station-keeping systems for permanent floating structures such as offshore renewable energy devices is vital to their lifelong integrity. In highly dynamic and/or deep-water applications, including hydrodynamics and structural dynamics in the mooring analysis is paramount for the accurate prediction of the loading on the lines and hence their dimensioning. This article presents a new workflow based on EDF R&D's open-source, finite-element analysis tool Code Aster, enabling the dynamic analysis of catenary mooring systems, with application to a floating wind turbine concept. The University of Maine DeepCwind-OC4 basin test campaign is used for validation, showing that Code Aster can satisfactorily predict the fairlead tensions in both regular and irregular waves. In the latter case, all of the three main spectral components of tension observed in the experiments are found numerically. Also, the dynamic line tension is systematically compared with that provided by the classic quasi-static approach, thereby confirming its limitations. Robust dynamic simulation of catenary moorings is shown to be possible using this generalist finite-element software, provided that the inputs be organised consistently with the physics of offshore hydromechanics.

【 授权许可】

Free