Aiming at the effects of diameter-thickness ratio, height-diameter ratio, penetration depth and initial defect properties of bucket foundation on axial and circumferential buckling characteristics of bucket wall, finite element model of mono bucket foundation and three-bucket jacket foundation are established, and the calculation results are compared with the existing formulas. The results show that in the process of penetrating, the circumferential buckling value of bucket foundation increases with the increase of penetrating depth, and the increasing rate also grows. The circumferential critical buckling stress of bucket foundation decreases with the increase of diameter-thickness ratio. and the ratio of diameter to thickness has the greatest influence on the value of circumferential buckling negative pressure in the late period of penetration. The initial defect has the significant effect on the circumferential buckling value of the foundation, and the modified formula of the US Navy test flume can well predict the circumferential buckling value in the process of foundation penetration.
Key words
offshore wind power /
wind turbines /
foundations /
buckling /
finite element methods /
underwater structures /
subsidence
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