INFLUENCE OF LOCAL SCOUR ON DYNAMIC RESPONSE OF WIND TURBINE STRUCTURE SYSTEM WITH COMPOSITE BUCKET FOUNDATION

Yu Tongshun; Tang Junhui; Liu Meimei; Xu Yu; Zhang Shubo

doi:10.19912/j.0254-0096.tynxb.2020-0759

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Acta Energiae Solaris Sinica ›› 2022, Vol. 43 ›› Issue (4) : 359-365. DOI: 10.19912/j.0254-0096.tynxb.2020-0759

Topics on Key Technologies for Safety of Electrochemical Energy Storage Systems and Echelon Utilization of Decommissioned Power Batteries

INFLUENCE OF LOCAL SCOUR ON DYNAMIC RESPONSE OF WIND TURBINE STRUCTURE SYSTEM WITH COMPOSITE BUCKET FOUNDATION

Yu Tongshun^1,2, Tang Junhui¹, Liu Meimei³, Xu Yu², Zhang Shubo¹

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Abstract

Firstly, the dynamic coupling model of wind generator tower-composite bucket foundation-foundation is established. The accuracy of the numerical model is verified by measured data from the actual engineering. Then, based on the published experimental results of wave and current scour around composite bucket foundation, the accurate scoured topography is established in the numerical model and the effect of the stress history after local scour on the remaining soil foundation parameters is considered. At last, the dynamic response characteristics of the wind turbine structure system are analyzed. The results are compared with those without considering local scour. Analysis results show that local scour to foundation reduces the natural vibration frequency of wind turbine structure, which leads to bigger generation risk of the wind turbine structure system. The vibration speed of the composite bucket foundation increase obviously after considering local scour of the foundation, and the maximum increase value reached to 8%. So the influence of local scour on the dynamic response of the structure system must be considered in the design of offshore wind turbines with composite bucket foundation, but the effect of the stress history after local scour on the remaining soil foundation parameters can be ignored.

Key words

local scour / mode / dynamic response / composite bucket foundation / stress history

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Yu Tongshun, Tang Junhui, Liu Meimei, Xu Yu, Zhang Shubo. INFLUENCE OF LOCAL SCOUR ON DYNAMIC RESPONSE OF WIND TURBINE STRUCTURE SYSTEM WITH COMPOSITE BUCKET FOUNDATION[J]. Acta Energiae Solaris Sinica. 2022, 43(4): 359-365 https://doi.org/10.19912/j.0254-0096.tynxb.2020-0759

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