Long term effect of operating loads on large monopile-supported offshore wind turbines in sand

A Abdullahi, S Bhattacharya, C Li, Y Xiao, Y Wang - Ocean Engineering, 2022 - Elsevier
Offshore wind turbines (OWTs) are known to experience modal property and foundation tilt
changes during operation. These may negatively influence their serviceability and can lead …

Modelling damping sources in monopile‐supported offshore wind turbines

C Chen, P Duffour - Wind Energy, 2018 - Wiley Online Library
Vibration damping in offshore wind turbines is a key parameter to predict reliably the
dynamic response and fatigue life of these systems. Damping in an offshore wind turbine …

Fatigue reliability of large monopiles for offshore wind turbines

J Velarde, C Kramhøft, JD Sørensen, G Zorzi - International journal of …, 2020 - Elsevier
Upscaling of traditional monopiles to support larger offshore wind turbines introduces fatigue-
related design challenges. The design becomes mainly driven by wave-induced fatigue …

Continuous dynamic monitoring of an onshore wind turbine

G Oliveira, F Magalhães, Á Cunha, E Caetano - Engineering Structures, 2018 - Elsevier
Current utility-scale wind turbines are highly dynamic systems excited by a large variety of
loading sources. The proper operation of wind turbines thus requires a complete knowledge …

Evaluation of damping estimates by automated operational modal analysis for offshore wind turbine tower vibrations

A Bajrić, J Høgsberg, F Rüdinger - Renewable Energy, 2018 - Elsevier
Reliable predictions of the lifetime of offshore wind turbine structures are influenced by the
limited knowledge concerning the inherent level of damping during downtime. Error …

[HTML][HTML] Critical assessment of hydrodynamic load models for a monopile structure in finite water depth

L Suja-Thauvin, EE Bachynski, F Pierella, M Borg… - Marine Structures, 2020 - Elsevier
The response from steep and breaking waves for a monopile structure is investigated by
analysis of experimental results and by application of numerical models for six irregular sea …

[HTML][HTML] Probabilistic analysis of offshore wind turbines under extreme resonant response: Application of environmental contour method

J Velarde, E Vanem, C Kramhøft, JD Sørensen - Applied Ocean Research, 2019 - Elsevier
Offshore wind turbines can exhibit dynamic resonant behavior due to sea states with wave
excitation frequencies coinciding with the structural eigenfrequencies. In addition to …

Numerical analysis of the long-term performance of offshore wind turbines supported by monopiles

H Ma, J Yang, L Chen - Ocean Engineering, 2017 - Elsevier
Offshore wind turbines (OWT) are often supported on large-diameter monopiles and
subjected to cyclic loading such as wind and wave actions. The cyclic loading can lead to an …

[HTML][HTML] Estimation of natural frequencies and damping using dynamic field data from an offshore wind turbine

K Norén-Cosgriff, AM Kaynia - Marine Structures, 2021 - Elsevier
The dynamic characteristics of offshore wind turbines are heavily affected by environmental
loads from wave and wind action and nonlinear soil behaviour. In the design of the monopile …

Stall-induced vibrations analysis and mitigation of a wind turbine rotor at idling state: Theory and experiment

C Chen, J Zhou, F Li, E Zhai - Renewable Energy, 2022 - Elsevier
With the development of wind turbine manufacturing technology, the wind turbine rotor is
facing more design challenges for exposing to complex environmental conditions and …