INVESTIGATION ON INFLUENCE OF AEROELASTIC MODELS ON DYNAMIC RESPONSE OF SUPPORT STRUCTURE FOR 15 MW OFFSHORE WIND TURBINE

Yang Dinghua; Ma Lu; Ding Jieyi; Zhang Xianfeng; Wang Wubin; Yang Yang

doi:10.19912/j.0254-0096.tynxb.2024-1378

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (12) : 644-652. DOI: 10.19912/j.0254-0096.tynxb.2024-1378

INVESTIGATION ON INFLUENCE OF AEROELASTIC MODELS ON DYNAMIC RESPONSE OF SUPPORT STRUCTURE FOR 15 MW OFFSHORE WIND TURBINE

Yang Dinghua¹, Ma Lu¹, Ding Jieyi², Zhang Xianfeng¹, Wang Wubin¹, Yang Yang²

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Abstract

In order to quantitatively analyze the influence of various aeroelastic models on the response for wind turbine support structures, the IEA 15 MW wind turbine is taken as the researoh object in this paper. Four types of aeroelastic models are developed based on Blade Element-Momentum theory （BEM）, Generalized Dynamic Wake （GDW）, Geometrically Exact Beam theory （GEBT） and Model Superposition Method （MSM）. The tower-top displacement and bending moments at the pile base are investigated and compared under typical operational and extreme parked conditions using the open-source software OpenFAST. The results show that the blade model based on GEBT results in a 34.89% reduction in tower-top displacement compared to that achieved by MSM under the wind speed of 11 m/s. The fluctuation of standard deviations of bending moments at the pile base based on GEBT is larger than that using MSM. The GEBT model is able to predict the dynamic response of the support structure more accurately in contrast with the MSM model, albeit requiring greater computational accuracy in time steps. Additionally, the discrepancies between structural models under the extreme sea conditions are notably significant. Specifically, the tower-top displacement and bending moments at the pile base of the GEBT model are more dramatic and severe than those of the MSM model under the wind speed of 50 m/s.

Key words

wind energy / offshore wind turbines / flexible blades / aeroelasticity / structural dynamics / geometrically exact beam theory

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Yang Dinghua, Ma Lu, Ding Jieyi, Zhang Xianfeng, Wang Wubin, Yang Yang. INVESTIGATION ON INFLUENCE OF AEROELASTIC MODELS ON DYNAMIC RESPONSE OF SUPPORT STRUCTURE FOR 15 MW OFFSHORE WIND TURBINE[J]. Acta Energiae Solaris Sinica. 2025, 46(12): 644-652 https://doi.org/10.19912/j.0254-0096.tynxb.2024-1378

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