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Dynamic Impedance of the Wide-Shallow Bucket Foundation for Offshore Wind Turbine Using Coupled Finite–Infinite Element Method

Author

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  • Jijian Lian

    (State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin 300350, China
    School of Civil Engineering, Tianjin University, Tianjin 300350, China)

  • Qi Jiang

    (State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin 300350, China
    School of Civil Engineering, Tianjin University, Tianjin 300350, China)

  • Xiaofeng Dong

    (State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin 300350, China
    School of Civil Engineering, Tianjin University, Tianjin 300350, China)

  • Yue Zhao

    (State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin 300350, China
    Power China Huadong Engineering Corporation Limited, No.201 Gaojiao Road, Yuhang District, Hangzhou 311122, China)

  • Hao Zhao

    (State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin 300350, China
    School of Civil Engineering, Tianjin University, Tianjin 300350, China)

Abstract

The dynamic impedances of foundation play an important role in the dynamic behavior and structural stability of offshore wind turbines (OWT). Though the behaviors of bucket foundation, which are considered as a relatively innovative foundation type under static loading, have been extensively investigated, the corresponding dynamic performances were neglected in previous research. This study focuses on the dynamic impedances of wide-shallow bucket foundations (WSBF) under the horizontal and rocking loads. Firstly, the numerical model was established to obtain the dynamic impedances of WSBF using the coupled finite-infinite element technique (FE-IFE). The crucial parameters affecting the dynamic responses of WSBF are investigated. It is shown that the skirt length mainly affects the rocking dynamic impedance and the diameter significantly affects the horizontal and coupling impedances, especially when the diameter is larger than 34 m. The overall dynamic responses of WSBF are profoundly affected by the relative soil thickness and the multi-layer soil stiffness. Additionally, dynamic impedances of WSBF are insensitive to the homogeneous soil stiffness. Lastly, the safety threshold curve was calculated according to the OWT, which can provide essential reference for the design of the OWT supported by large scale WSBF.

Suggested Citation

  • Jijian Lian & Qi Jiang & Xiaofeng Dong & Yue Zhao & Hao Zhao, 2019. "Dynamic Impedance of the Wide-Shallow Bucket Foundation for Offshore Wind Turbine Using Coupled Finite–Infinite Element Method," Energies, MDPI, vol. 12(22), pages 1-28, November.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:22:p:4370-:d:287734
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    References listed on IDEAS

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    1. Jijian Lian & Ou Cai & Xiaofeng Dong & Qi Jiang & Yue Zhao, 2019. "Health Monitoring and Safety Evaluation of the Offshore Wind Turbine Structure: A Review and Discussion of Future Development," Sustainability, MDPI, vol. 11(2), pages 1-29, January.
    2. Jijian Lian & Junni Jiang & Xiaofeng Dong & Haijun Wang & Huan Zhou & Pengwen Wang, 2019. "Coupled Motion Characteristics of Offshore Wind Turbines during the Integrated Transportation Process," Energies, MDPI, vol. 12(10), pages 1-23, May.
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    Cited by:

    1. Yangchun Han & Jiulong Cheng & Qiang Cui & Qianyun Dong & Wanting Song, 2020. "Uplift Bearing Capacity of Cone-Cylinder Foundation for Transmission Line in Frozen Soil Regions, Using Reduced-Scale Model Tests and Numerical Simulations," Energies, MDPI, vol. 13(8), pages 1-22, April.
    2. Hao Zhao & Hongjie Zheng & Jijian Lian, 2022. "Experimental Study on Static Pressure Sedimentation for a Thick-Walled Bucket Foundation in Sand," Energies, MDPI, vol. 15(16), pages 1-15, August.

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