Decay Analyses of Eight Floating Wind Turbines

The objective of this work is to carry out time-domain dynamic decay analyses on eight floating wind turbines. From this perspective, this paper examines various aspects of eight floating wind turbines, including their six-degree-of-freedom responses, natural periods, and corresponding frequencies. Additionally, this paper explores the mooring line forces, tower bases, tower top bending moments, and shear forces around the x- and y-axes. The eight floating wind turbines considered in this study include two Spar floating wind turbines, namely DTU Spar 1 and DTU Spar 2, one Tension Leg Platform (TLP), and five Semi-submersibles, which are OO-Star, CSC, WindFloat, INO-WINDMOOR, and VolturnUS-S.

The detailed analyses provide insight into how each turbine design responds to dynamic conditions, a crucial aspect in evaluating their performance and stability under various environmental scenarios. Furthermore, similar analyses of the drivetrains of these floating wind turbines are also conducted, as understanding the drivetrain dynamics is essential for optimizing energy production and reducing maintenance costs. Subsequent sections of the paper incorporate additional findings, enhancing the understanding of floating wind turbine technology and its potential impact on the renewable energy sector. Further subjects related to floating wind turbines, such as mooring systems, control systems, artificial intelligence, and commercial software, are also considered.