Performance-based assessment of the monopile foundation of offshore wind turbines

Wang, Tianpeng; Zhang, Zechao; Zhang, Jie; Chen, Zhihai; Xian, J. T.; Zhang, Lulu

doi:10.1016/j.oceaneng.2022.113083

Cited by 11 publications

(1 citation statement)

References 44 publications

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“…This consolidates the need to consider the effect of wind velocity on the stresses generated in the OWT support structure. Previous research works have mainly focussed on researching the soil-pile interaction of wind turbine support structures, [7][8][9][10][11][12][13][14] fatigue assessments, design and performance, 3,[14][15][16][17][18][19][20] induced stresses in welds and connections and their performance [21][22][23][24][25] and recently, corrosion 26,27 while applying finite element analysis. 28,29 Although key findings involved optimised design parameters, stress concentrations and corrosion mechanisms, missing gaps include integrating these factors, mainly how corrosion and stresses interact in the support structure.…”

Section: Introductionmentioning

confidence: 99%

Stress analyses of high-rated capacity large diameter offshore wind turbines: Analytical and numerical analyses of uniform corrosion effects

Okenyi,

Bodaghi,

Siegkas

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part C:

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As the wind energy sector grows, offshore wind turbines (OWTs) have been pushed to have higher power outputs. This has led to large-diameter OWT support structures that are capable of withstanding aerodynamic and hydrodynamic loads as well as corrosion. This research analyses a 15-megawatt (MW) OWT support structure using analytical and numerical models. The analytical model was applied based on the Euler-Bernoulli beam theory. Static and modal finite element models were also applied. The structural stability implications of uniform corrosion on the stress evolution of the monopile and tower at different corrosion zones were discussed. Analytical and numerical (finite element analysis) predictions of stress evolution for different wind velocities and uniform corrosion material loss showed an agreement. The analyses showed that material loss due to corrosion increased the stress levels in the support structure. The location of the maximum tensile stress changed from the submerged to the splash zone, indicating that the splash zone may accumulate more damage over time due to the reduction of the monopile thickness and generation of local pits. Predicting the stress evolution due to uniform corrosion could be instrumental in the future designs of OWTs. It can be integral to fatigue assessments for enabling more detailed and accurate life predictions.

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