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Development and Validation of Methodologies for Structural Monitoring of Floating Wind Turbines

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "A3: Wind, Wave and Tidal Energy".

Deadline for manuscript submissions: 15 April 2025 | Viewed by 1568

Special Issue Editors


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Guest Editor
Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
Interests: operational modal analysis; floating wind turbines; structural dynamics; structural health monitoring

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Guest Editor
Department of Civil and Environmental Engineering, Northeastern University, Boston, MA 02115, USA
Interests: data-driven structural health monitoring; structural dynamics; virtual sensing; offshore wind turbines

E-Mail Website1 Website2
Guest Editor
Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
Interests: structural health monitoring; operational modal analysis; wind turbines; structural dynamics
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Special Issue Information

Dear Colleagues,

With an increase in environmental concerns, the search for sustainable energy scenarios has been gaining more and more attention from academic research projects and industries in recent years. In particular, with the advent of floating platform solutions, the exploration of wind energy in offshore scenarios—which until very recently was confined to lower depths where bottom-fixed solutions (e.g., gravity structures and monopiles) for the overall stability of the system are used—has been successfully extended to deeper waters, which offer optimal conditions due to higher mean wind speeds and lower turbulence winds.

Although placing a wind turbine on top of a floating platform entails additional challenges for the design and operation teams, the particular dynamic nature of these complex structures also allows for the definition of new monitoring strategies that are still mostly unexplored, but which may play a very important role for the better, more efficient management and exploration of floating offshore wind farms.

This Special Issue aims not only to explore the extension and validation of conventional structural monitoring techniques to the offshore field, but also to develop new methodologies which are specially designed for these structures, with a particular focus on approaches for enhanced structural health monitoring, operational modal analysis and fatigue damage evaluation.

Dr. Francisco Pimenta
Dr. Eleonora Tronci
Dr. Sérgio Pereira
Guest Editors

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Keywords

  • floating wind turbines
  • operational modal analysis
  • structural dynamics
  • structural health monitoring
  • fatigue evaluation

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Published Papers (1 paper)

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Research

17 pages, 4025 KiB  
Article
On the Effect of Nonlinear Damping Sources in Output-Only Identification Methods Applied to Floating Wind Turbines
by Francisco Pimenta, Vitor Liotto Pedrelli, Thea Vanelli and Filipe Magalhães
Energies 2024, 17(7), 1671; https://doi.org/10.3390/en17071671 - 1 Apr 2024
Viewed by 974
Abstract
Output-only methods for modal identification are only strictly valid if a set of requirements are fulfilled regarding both structural and environmental conditions. A particularly challenging effect in wind turbine dynamics is the significant presence of nonlinear damping sources coming from aerodynamic forces and, [...] Read more.
Output-only methods for modal identification are only strictly valid if a set of requirements are fulfilled regarding both structural and environmental conditions. A particularly challenging effect in wind turbine dynamics is the significant presence of nonlinear damping sources coming from aerodynamic forces and, in offshore applications, hydrodynamic forces on the substructure. In this work, the impact of these terms is firstly discussed in analytical terms, and then the corresponding effect on the performance of the covariance-driven stochastic subspace identification is evaluated on a single-degree-of-freedom model. The analysis is then extended to a full hydro-aeroelastic simulation of a 5 MW floating wind turbine using the open source software OpenFAST, mimicking the structural response in free decay tests and in parked conditions with turbulent wind fields. The results show that output-only identification methods are applicable in these challenging scenarios, but the results obtained must be carefully interpreted, since their dependence on the environmental conditions and motion amplitude imply that they are not directly translated into the structure properties, although still closely related to them. Full article
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