NONLINEAR DYNAMIC RESPONSE OF OFFSHORE WIND TURBINESTRUCTURE UNDER COMBINED WIND-WAVE ACTION

Lin Ren; Chen Junling; Feng Youquan

doi:10.19912/j.0254-0096.tynxb.2024-1474

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Acta Energiae Solaris Sinica ›› 2026, Vol. 47 ›› Issue (1) : 424-431. DOI: 10.19912/j.0254-0096.tynxb.2024-1474

NONLINEAR DYNAMIC RESPONSE OF OFFSHORE WIND TURBINESTRUCTURE UNDER COMBINED WIND-WAVE ACTION

Lin Ren¹, Chen Junling¹, Feng Youquan²

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Abstract

Taking one IEA-15 MW monopile wind turbine as an example, an integrated nonlinear model that considers blade-nacelle-tower-foundation interaction is established to investigate its dynamic characteristics under the combined actions of wind and waves based on the hybrid form of geometrically exact beam theory. The accuracy of the proposed numerical model is validated by comparing its calculation results with those of the open-source software OpenFAST. The results show that the displacement response at the top of the tower is affected by the combined effect of environmental conditions and the operating conditions. The aerodynamic loads play a dominant role in the dynamic response of the tower. The wave may have a certain inhibitory effect on the structural dynamic response due to the phase difference between the wind and wave loads. The acceleration response at the tower top is mainly influenced by the first vibration mode of the tower and the maximum acceleration response of the tower occurs at 0.8 times the tower height. The influence of the second-order vibration mode on the structural vibration cannot be ignored.

Key words

offshore wind turbines / nonlinear analysis / dynamic response / combined wind-wave action / geometrically exact beam theory

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Lin Ren, Chen Junling, Feng Youquan. NONLINEAR DYNAMIC RESPONSE OF OFFSHORE WIND TURBINESTRUCTURE UNDER COMBINED WIND-WAVE ACTION[J]. Acta Energiae Solaris Sinica. 2026, 47(1): 424-431 https://doi.org/10.19912/j.0254-0096.tynxb.2024-1474

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