Posters

Abstract

In this work, we present a fully coupled aero-hydro-servo-elastic analysis model for floating wind platforms. The model introduces a novel approach to solving fluid-structure interaction dynamics in the time domain, leveraging the seakeeping hydrodynamics framework SeaFEM, developed by the authors. Within this framework, a detailed full 3D structural model is embedded to tightly couple the structural dynamics. In addition, the model is coupled with OpenFAST to integrate the wind turbine dynamics, resulting in a comprehensive tool for integrated load analysis (ILA) of floating wind turbines. Traditionally, the structural dynamics of floating wind turbines have been addressed using simplified global or partial models, mainly due to the prohibitive computational cost of time-domain simulations with high-fidelity finite element (FE) models, which can easily involve several million degrees of freedom (DoFs). To overcome this limitation, this work introduces a Model Order Reduction (MOR) strategy based on a Modal Matrix Reduction (MMR) technique. This approach significantly reduces the number of DoFs and the associated computational cost. An enhanced MMR methodology ensures high accuracy of the reduced model, making it especially well-suited for practical application in the design and verification of offshore structures. This work has been carried out within the framework of the H2020 project 952966 FIBREGY and the FLEXFLOAT project, funded by the Spanish Ministry of Science, Innovation and Universities (PID2024-158162NB-I00). In addition, a strong validation effort has been conducted under the IEA Wind’s OC7 Project and through a Joint Development Project for the Validation and Application of SeaFEM’s Hydro-Elasticity Reduced Order Model, developed in collaboration with Lloyd’s Register. The support and collaboration of all the organizations involved is gratefully acknowledged.