Session: Hydrodynamic and Coupled Analyses-1

Paper Number: 165235

165235 - Fully Coupled Aero-Hydro-Structural Analysis of Floating Wind Platforms 

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. A detailed full 3D structural model is introduced into this framework to tightly couple the structural dynamics. On another note, SeaFEM is also coupled with OpenFAST to integrate the wind turbine dynamics. This results in a complete tool for integrated load analysis (ILA) of floating wind turbines.

Structural dynamics of floating wind turbines are typically addressed by modelling the structural response with simplified models. And the main reason can be found in the computational cost of solving, in the time-domain, the structural dynamics of a high-fidelity finite element (FE) model. Hence, a reduce order model based on modal matrix reduction (MMR) is applied to largely reduce the number of degrees of freedom and computational cost to solve the structural dynamics in the time-domain.

A detailed structural design of the OC4-DeepCwind is used as an application case.  The consistency of the MMR against the high-fidelity FE solution has been verified. Also, a methodology is proposed to identify critical resonant conditions and hotspots based on the structural energy.

This work has been developed under the H2020 project Fibregy (Development, engineering, production and life-cycle management of improved FIBRE-based material solutions for structure and functional components of large offshore wind enerGY and tidal power platform; https://fibregy.eu/).

Presenting Author: Borja Servan Camas International Centre for Numerical Methods in Engineering

Presenting Author Biography: Borja Serván holds a research associate professor position at the International Centre for Numerical Methods in Engineering (CIMNE), where he leads the Marine and Offshore Engineering group.
Main developer of the seakeeping hydrodynamics software SeaFEM.
Areas of research: seakeeping-hydrodynamics, hydro-elasticity, semi-Lagrangian methods for fluid dynamic, and artificial intelligence for seakeeping.
Expertise in numerical methods such as Finite Element, Lattice Boltzmann Methods, and semi-Lagrangian methods.

Authors:

Borja Servan Camas International Centre for Numerical Methods in Engineering
Julio García-Espinosa Universidad Politécnica de Madrid (UPM)
Irene Berdugo_parada Centre Internacional de Mètodes Numèrics a l’Enginyeria (CIMNE)
Andrés Pastor Universidad Politécnica de Madrid (UPM)