... Abstract In offshore wind, the modelled structural dynamics used in design do not fully describe the reality of build structures. For monopile supported turbines, previous work and other publications show an underestimation of eigenfrequencies. As fatigue and lifetime of a foundation...

... and ultimate limit state utilisation is still reduced when a wave spreading is adopted. frequency dependent wave spreading monopile FLS ULS SLS aeroelastics soil damping Proceedings of the ASME 2024 43rd International Conference on Ocean, Offshore and Arctic Engineering OMAE2024 June 9-14, 2024...

... is thus presented to improve the model predictions and understand the causes of the mismatch. Finite-element analyses, based on the current state-of-the-art soil-monopile interaction models, were considered since the foundation stiffness is identified as a key source of the discrepancy between in situ...

... Abstract Geotechnical processes related to offshore monopiles for supporting OWTs in soft clay involve intermittent episodic remoulding during storm events and reconsolidation during calm conditions. To assess the resulting response of monopiles, this study employs a three-dimensional finite...

... Abstract The following paper presents key findings from the Empire Wind monopile model tests. The tests were performed at SINTEF Oceans test facilities in late 2021 and early 2022 as part of FEED and early Detailed Engineering. Due to harsh weather conditions, with the potential for tropical...

..., the suitability of performance metrics is analyzed and discussed for different offshore wind farm sizes and related recommendations are given. life extension offshore wind turbine structural integrity monopile mean-variance optimization Proceedings of the ASME 2022 41st International Conference...

... of the deep neural network training for the classification of ageing offshore wind turbines. life extension offshore wind turbine structural integrity monopile modern portfolio theory Proceedings of the ASME 2022 41st International Conference on Ocean, Offshore and Arctic Engineering OMAE2022...

..., with a particular focus on the structural health of monopile foundations. This will lay the groundwork for creating a digital model which can be used to investigate the impact of certain key parameters on the turbine’s health and remaining useful life, as well as for future work in creating a decision support...

... Abstract In this study, three IEA Wind 15MW offshore reference wind turbines with monopile support structures, are placed at a distance of eight rotor diameters in the prevailing wind direction. FAST. Farm responses are simulated under different wind conditions and sea states. The outputs...

... Abstract Monopile-supported offshore wind turbines (OWTs) are dynamically sensitive structures, in which their design is principally based on a dimensioning criterion related to its fundamental frequencies. Therefore, an accurate estimation of the natural frequency is essential to assess...

... network to be able to discriminate different structural conditions. structural health offshore wind turbine monopile signal processing nonparametric statistics Proceedings of the ASME 2021 40th International Conference on Ocean, Offshore and Arctic Engineering OMAE2021 June 21-30, 2021...

... vibrators are presented and key elements such as crane uplift, frequency and acceleration displayed. monopile offshore foundation decommissioning offshore wind life cycle LARGE-SCALE MODEL INVESTIGATION FOR MONOPILE DECOMMISSIONING OF OFFSHORE WIND TURBINES OVERPRESSURE AND VIBRATORY PILE...

... in 2020. monopile offshore foundation decommissioning offshore wind life cycle overpressure decommissioning LARGE-SCALE TESTS WITH HYDRAULIC AND PNEUMATIC OVERPRESSURE FOR MONOPILE DECOMMISSIONING OF OFFSHORE WIND TURBINES Nils Hinzmann1, Jörg Gattermann, Patrick Lehn Institute...

... Abstract Renewable Energies become more and more important in industries and society all over the world. In Germany, offshore wind farms generated 49 % of the renewable energies in 2018. Monopiles are the preferred system for the foundation of offshore wind turbines in water depths up to 40 m...

... Abstract The assessment of monopile installation by means vibratory driving is discussed for a platform located in the Dutch Sector of the North Sea. The vibratory driving analysis of the 4.7 m diameter monopile was performed using the “Hypervib” method in order to evaluate the performance...

... (i.e. significant wave height, spectral peak period) on the dynamic response of a Monopile Wind Turbine (NREL 5MW) are analysed. Two operative conditions are considered: rated wind and cut-out wind speed. In each case, the 50-year environmental contour (EC) is plotted for a site located in the North...

...EVALUATION OF UNCERTAINTY OF DAMAGE RESULTS IN EXPERIMENTAL MODELLING OF MONOPILE FOUNDATION SCOUR PROTECTION Minghao Wu1 Ghent University Ghent, Belgium Jonas Arnout Ghent University Ghent, Belgium Josep Molina Ruiz Ghent University Ghent, Belgium Carlos Arboleda Chavez Ghent University Ghent...

... Abstract The effect of Reynolds number (Re) on the local scour around a monopile encountering steady current was investigated experimentally in a water flume. The experiment was performed using circular cylinders with different diameters under two different freestream velocities, covering both...