Fluid-structure interaction and stress analysis of a floating wind turbine. (July 2021)

• Record Type: Journal Article
• Authors: Wiegard, B.; König, M.; Lund, J.; Radtke, L.; Netzband, S.; Abdel-Maksoud, M.; Düster, A.
• Is Part Of: Marine structures. Volume 78(2021)
• Publication Date: 2021-07
• Subjects: Fluid-structure interaction -- Stress analysis -- Self-aligning floating wind turbine -- Partitioned solution approach -- Superelement; Naval architecture -- Periodicals; Offshore structures -- Periodicals; Architecture navale -- Périodiques; Structures offshore -- Périodiques; Naval architecture; Offshore structures; Periodicals; 620.4162
• DOI: 10.1016/j.marstruc.2021.102970
• Languages: English
• ISSNs: 0951-8339

Abstract

Abstract: In this paper, we describe a method to investigate the fluid-structure interaction of a floating wind turbine and to analyze the global deformations and the corresponding stresses with a detailed finite element model. To solve the fluid-structure interaction problem, a partitioned approach is chosen. The in-house C++ library comana, which was developed to solve multi-physic problems by coupling existing solvers, is extended to couple the fluid solver pan MARE and the structural solver ANSYS. The significance of the interaction of structural deformations and the fluid loads is pointed out for the rotor of the wind turbine. In order to enable the use of a detailed finite element model in the fluid-structure interaction simulation, a model reduction method is applied in ANSYS. As a result, an efficient stress analysis can be performed under consideration of the fluid-structure interaction. Highlights: The partitioned approach is used for a fluid-structure interaction (FSI) simulation. A predictor and a convergence acceleration ensure a stable coupling of the solvers. Pan MARE and ANSYS are employed for the FSI simulation of a floating wind turbine. Superelements are created in ANSYS which enable the use of detailed FE models. A detailed stress analysis during an extreme wave event is carried out.