On the Fatigue Performance of Wind Turbine Foundation in Three-dimensional Wind Field
Considering the overall effect of the three-dimensional wind field on wind turbine structures,the fatigue per-formance of the wind turbine foundation is studied.A finite element model of the 2 MW wind turbine is established in ABAQUS software,and the harmonic superposition method is used to simulate the three-dimensional pulsating wind field.The location of the hotspots is determined and the time history curves of the stress in hotspots are obtained.The displacement characteristic values of the maximum displacement point under the three-dimensional wind field and the longitudinal direction wind effect are compared.The necessity of considering the effect of the three-dimensional wind field is clarified.Then,parametric analysis is carried out on the lower flange width,burial depth and concrete strength grade of the foundation ring.It is shown that increasing the lower flange width and the burial depth,or improving the concrete strength grade can reduce the fatigue damage of the wind turbine foundation to a certain extent.
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