Aiming at the problem of the first-order vortex induced vibration of the steel tower of the wind turbine generator system（WTGS）, the first-order vortex induced vibration characteristics of the whole WTGS are studied by using the simulation method of solid fluid combination. Firstly, taking a 2.5 MW and 140 m tower unit as the research object,a tower-blade coupling simulation structure model is established. The resonance frequency and resonance wind speed range of the first-order vortex induced vibration of the whole WTGS are analyzed by modal and CFD simulation, which shows that the wind turbine tower has the risk of first-order vortex induced vibration. Then, a fast simulation method based on solid fluid iteration is proposed to calculate the first-order vortex induced vibration displacement. Considering the coupling effect of the blades on the vortex-induced vibration of the tower, the maximum vibration displacement is obtained. Field tests show that the measured maximum first- order vortex-induced vibration displacement is basically consistent with the simulation results, which verifies the accuracy of the simulation method.
Key words
wind turbine generator /
vortex induced vibration /
maximum displacement /
solid fluid iteration /
field test
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References
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