FORCE ANALTSIS OF FOUNDATION AND BUCKET TOP NODES OF FIVE-BUCKET JACKET FOR OFFSHORE WIND POWER

Lian Jijian; Xu Shuyun; Wang Haijun; Guo Yaohua; Li Huishan

doi:10.19912/j.0254-0096.tynxb.2023-0856

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Acta Energiae Solaris Sinica ›› 2024, Vol. 45 ›› Issue (9) : 564-573. DOI: 10.19912/j.0254-0096.tynxb.2023-0856

FORCE ANALTSIS OF FOUNDATION AND BUCKET TOP NODES OF FIVE-BUCKET JACKET FOR OFFSHORE WIND POWER

Lian Jijian, Xu Shuyun^1,2, Wang Haijun^1,2, Guo Yaohua^1,2, Li Huishan^1,2

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Abstract

The research focuses on a five-bucket jacket foundation that used for a large wind turbine in a far-reaching sea area in Guangdong. The finite element software was used to carry out on the tilt rate, ultimate bearing capacity and buckling characteristics of the bucket. And the multi-parameter sensitivity analysis was carried out on the nodes at the top of the bucket to obtain the optimal structural. It is found that the five-bucket foundation has obvious advantages compared with the single-bucket foundation in the following parts. When the top nodes are close to the middle bucket, the stress is mainly exerted by the middle bucket, and the maximum stress is mainly concentrated at the joint of the side bucket and the bottom of the middle bucket skirt. When the top nodes of the bucket shift outward, the stress is transferred from the middle bucket to the side bucket, and the maximum stress is transferred to the top of the side bucket skirt along the loading direction.The ultimate bearing capacity of the foundation increases linearly with the increase of the opening of the jacket root. Under the horizontal load and the bending moment load respectively, the passive earth pressure near the center of rotation is greatly affected by the bucket top nodes. The more the top nodes deviates, the smaller the passive earth pressure becomes. The active earth pressure below the center of rotation is greatly affected by the bucket top nodes, and the more the top nodes is shifted outward, the greater the active earth pressure will be.

Key words

offshore wind / power stress analysis / bearing capacity / five-bucket structure / bucket top node

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Lian Jijian, Xu Shuyun, Wang Haijun, Guo Yaohua, Li Huishan. FORCE ANALTSIS OF FOUNDATION AND BUCKET TOP NODES OF FIVE-BUCKET JACKET FOR OFFSHORE WIND POWER[J]. Acta Energiae Solaris Sinica. 2024, 45(9): 564-573 https://doi.org/10.19912/j.0254-0096.tynxb.2023-0856

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