DYNAMIC RESPONSE ANALYSIS OF FLOATING OFFSHORE WIND TURBINES BLADES BASED ON PANEL METHOD AND FINITE ELEMENT METHOD

Chen Diyu; Liu Liqin; Li Yan; Zhang Ruoyu

doi:10.19912/j.0254-0096.tynxb.2022-0093

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Acta Energiae Solaris Sinica ›› 2023, Vol. 44 ›› Issue (6) : 374-382. DOI: 10.19912/j.0254-0096.tynxb.2022-0093

DYNAMIC RESPONSE ANALYSIS OF FLOATING OFFSHORE WIND TURBINES BLADES BASED ON PANEL METHOD AND FINITE ELEMENT METHOD

Chen Diyu, Liu Liqin³, Li Yan³, Zhang Ruoyu³

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Abstract

Considering the hydro-aero coupled model, the numerical simulation algorithm on the dynamic response of floating offshore wind turbines （FOWTs） under environmental loading including wind and waves is established. The pressure distribution and time-varying aerodynamic loads on each blade are calculated with velocity-potential based panel method. Then the finite element model of NREL 5 MW wind turbine is established, and the blade deformation and stress distribution are obtained through the transient analysis. The results show that the von Mises stress is greater where the elements are closer to the root in the span direction, while the larger stress can be also observed near the leading edge in the chord direction. Comparing with the wind loads acting alone, the wave load will lead to the larger surge and pitch amplitudes. This amplified motion can transmit more energy to the upper wind turbines which will cause larger blade deformations and stresses.

Key words

aerodynamic loads / offshore wind turbines / dynamic response / unsteady panel method / finite element method

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Chen Diyu, Liu Liqin, Li Yan, Zhang Ruoyu. DYNAMIC RESPONSE ANALYSIS OF FLOATING OFFSHORE WIND TURBINES BLADES BASED ON PANEL METHOD AND FINITE ELEMENT METHOD[J]. Acta Energiae Solaris Sinica. 2023, 44(6): 374-382 https://doi.org/10.19912/j.0254-0096.tynxb.2022-0093

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