Dynamic analysis of 10 MW offshore wind turbines with different support structures subjected to earthquake loadings

Yan, Yangtian; Yang, Yang; Bashir, Musa; Li, Chun; Wang, Jin

doi:10.1016/j.renene.2022.05.045

Cited by 15 publications

(4 citation statements)

References 41 publications

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“…Considering the environmental loads (wind, wave, current, etc. ), Yan et al 48 analyze the damage degree of the jacket structures by comparing the changes of natural frequencies and vibration modes of the supporting jacket structures. Because the experimental object in this study is an actual engineering structure, the proposed method can be used in practical engineering.…”

Section: Structure Health Monitoring Of Offshore Jacket Structuresmentioning

confidence: 99%

Condition-based structural health monitoring of offshore wind jacket structures: Opportunities, challenges, and perspectives

Leng

Gardoni

Wang

et al. 2023

Structural Health Monitoring

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Structural health monitoring (SHM) has been recognized as a useful tool for safety management and risk reduction of offshore wind farms. In complex offshore environment, jacket structures of offshore wind turbines are prone to damages due to corrosion and fatigue. Effective SHM on jacket structures can substantially reduce their operation risk and costs. This work reviews the latest progress on the SHM of offshore wind jacket structures. The achievements in the structural damage identification, location, quantification, and remaining useful life (RUL) estimation are respectively introduced in detail, and existing challenges are discussed. Possible solutions to the challenges using the Digital Twin (DT) technology are put forward. The DT is able to mirror a real jacket structure into a virtual model, and Bayesian updating can refresh the virtual model parameters in real-time to keep consistency between virtual model and physical structure; then, just-in-time SHM can be carried out for jacket structures by performing damage detection, location, quantification, and RUL estimation using the virtual model. As a result, the DT may provide engineers and researchers a practicable tool for safety monitoring and risk reduction of fixed foundation offshore wind structures.

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Section: Structure Health Monitoring Of Offshore Jacket Structuresmentioning

confidence: 99%

Condition-based structural health monitoring of offshore wind jacket structures: Opportunities, challenges, and perspectives

Leng

Gardoni

Wang

et al. 2023

Structural Health Monitoring

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“…Offshore wind turbines are widely used because of their unique advantages. However, owing to their complex operating conditions, a series of simulations and experimental studies have been conducted by scholars worldwide [21], who examined the dynamic stresses of wind turbines under operating conditions such as wind-wave coupling [22], non-Gaussian incidence [23], and earthquakes [24,25] considering rigid-flexible coupling [26]. However, the mechanism underlying the effect of wind direction changes on the dynamic stresses is yet to be elucidated.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation on coupling characteristics of principal and shear stress of wind turbine under dynamic change of wind direction

Yan,

Wang,

Zhang

et al. 2024

J. Phys.: Conf. Ser.

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The wind direction misalignment problem significantly impacts the abnormal alteration in aerodynamic distribution, ultimately resulting in an abnormal stress response of wind turbines. In this study, an experimental method was employed to simulate dynamic wind changes. The study aimed to analyze the laws and mechanisms governing changes in principal and shear stress on wind turbine blades and towers under different wind dynamic change angles. The results revealed that variations in the initial tip speed ratio significantly influenced the stress experienced by the tower during dynamic changes in wind direction. The coupling effect of yaw and gyroscopic moments led to a transient increase in both principal and shear stresses in the wind turbine tower during the early stage of wind direction change. Due to inertia and aerodynamic deterioration, the principal and shear stress values of wind turbine blades and towers exhibited delayed changes. Notably, when the wind direction changed by 15° from the direction the turbine was facing, the principal stress fluctuations in the wind turbine tower and blade were 5.13 and 1.23 times higher, respectively. Therefore, when developing a small-angle yaw strategy, stress fluctuations should be comprehensively considered, in addition to power requirements.

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“…Based on previous research, vertical shaking amplifies the acceleration and settlement of the nacelle in the OWT system, thereby influencing the failure mechanisms of the OWT under seismic events. For instance, research has been conducted on the effects of vertical seismic motion on liquefaction in the soil surrounding the foundation and the deformation characteristics of the tower for various foundation types [1][2][3][4]. However, the research on tripod suction bucket foundations remains IOP Publishing doi:10.1088/1755-1315/1332/1/012015 2 limited.…”

Section: Introductionmentioning

confidence: 99%

Seismic response of tripod suction bucket foundation for offshore wind turbine considering multidirectional earthquake loads

Wang,

Liang,

Zhang

et al. 2024

IOP Conf. Ser.: Earth Environ. Sci.

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Tripod suction buckets offer several advantages as offshore wind turbine (OWT) foundations, including cost-effective installation, high stability, and resistance to overturning. In seismically active regions, OWTs experience horizontal and vertical directions seismic excitations. This study employed an advanced three-dimensional nonlinear finite element analysis to investigate the influence of vertical seismic motions on the dynamic behavior of tripod bucket foundations installed in nonhomogeneous clay deposits. By adopting a simple kinematic hardening model to capture the foundation-soil nonlinear dynamic interaction, parametric analyses were conducted to study the effect of vertical seismic motions, considering several earthquake types and undrained shear strengths of the clay deposit. The results show that the influence of the vertical seismic motion on the dynamic response and deformation of the nacelle depends on the dominant frequency of the vertical seismic motion and the overturning resistance capacity of the OWT in different horizontal directions. The deformation mechanisms of an OWT vary with the strengths of the clay deposits. Based on these analyses, this study offers insights into the influence of vertical seismic motions on the dynamic response of tripod suction bucket foundations.

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Dynamic analysis of 10 MW offshore wind turbines with different support structures subjected to earthquake loadings

Cited by 15 publications

References 41 publications

Condition-based structural health monitoring of offshore wind jacket structures: Opportunities, challenges, and perspectives

Condition-based structural health monitoring of offshore wind jacket structures: Opportunities, challenges, and perspectives

Experimental investigation on coupling characteristics of principal and shear stress of wind turbine under dynamic change of wind direction

Seismic response of tripod suction bucket foundation for offshore wind turbine considering multidirectional earthquake loads

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