COUPLING DYNAMIC CHARACTERISTICS AND DAMAGE ANALYSIS OF OFFSHORE WIND TURBINES UNDER SEA ICE IMPACT

Liu Yingzhou; Shi Wei; Wang Wenhua; Li Xin; Wang Bin

doi:10.19912/j.0254-0096.tynxb.2022-0201

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Acta Energiae Solaris Sinica ›› 2023, Vol. 44 ›› Issue (6) : 427-435. DOI: 10.19912/j.0254-0096.tynxb.2022-0201

COUPLING DYNAMIC CHARACTERISTICS AND DAMAGE ANALYSIS OF OFFSHORE WIND TURBINES UNDER SEA ICE IMPACT

Liu Yingzhou^1,2, Shi Wei^2,3, Wang Wenhua^1,2, Li Xin^1,2, Wang Bin^4,5

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Abstract

Based on the NREL-5 MW monopile offshore wind turbine（OWT）, considering the pile-soil interaction, a three-dimensional finite element model of the interaction between ice and offshore wind turbine structure is established. Considering the coupling effect of ice and structure interaction, the damage assessment and dynamic analysis of OWT combined wind and sea ice loads is carried out in ANSYS/LS-DYNA. The area damage ratio is suggested to evaluate the damage of OWTs under dynamic ice loads. Meanwhile, the influence of sea ice thickness on the structural damage and response of OWT is explored. Based on the performed study, it can be seen that the mean value and peak value of dynamic ice force increase, and the dynamic response of offshore wind turbine increases significantly with the increasing of ice thickness. The most significant structural damage is observed at the sea ice impact area, by comparing with the damage of the remaining locations. The area damage rate proposed in this paper can reasonably reflect the damage degree of offshore wind turbines under the action of different ice thicknesses. Ice thicknesses not only affect the area damage rate of single pile foundation, but also affect the linear change rate of damage rate.

Key words

offshore wind turbines / pile foundations / area damage rate / dynamic response / sea ice

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Liu Yingzhou, Shi Wei, Wang Wenhua, Li Xin, Wang Bin. COUPLING DYNAMIC CHARACTERISTICS AND DAMAGE ANALYSIS OF OFFSHORE WIND TURBINES UNDER SEA ICE IMPACT[J]. Acta Energiae Solaris Sinica. 2023, 44(6): 427-435 https://doi.org/10.19912/j.0254-0096.tynxb.2022-0201

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