Penetration characteristics of composite bucket foundations under eccentric loads during integrated offshore wind turbine installation

IF 5.6 2区工程技术 Q1 ENGINEERING, CIVIL

Marine Structures Pub Date : 2026-01-30 Epub Date: 2025-10-09 DOI:10.1016/j.marstruc.2025.103949

Hongyan Ding , Tingyuan Wang , Conghuan Le , Yunlong Xu , Puyang Zhang

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引用次数: 0

Abstract

To address the challenges of penetration attitude control caused by eccentric loads during the integrated penetration of composite bucket foundations for offshore wind power, this study combines model tests and numerical simulations to systematically investigate the penetration characteristics, seepage field evolution, and critical suction mechanism under eccentric loads. The effects of different eccentric load magnitudes and positions on penetration characteristics were analyzed. Results show that increasing eccentric loads reduces penetration resistance (about 15 % lower than the non-eccentric case), and applying the load directly above a single compartment enhances installation stability through a three-compartment compensation strategy. The study reveals the asymmetric distribution of excess pore water pressure in the soil under eccentric loads, with the negative pore pressure loss at the outer wall of the compensation compartment reduced by approximately 20 % compared to the non-compensation compartment. Critical seepage failure occurs at the interface between the non-compensation compartments and the partition plates. Based on the relationship between seepage paths and pressure differences, a critical suction formula is derived, considering the number of compensation compartments, pressure differences, and penetration depth. The results show that eccentric loads lead to a maximum reduction of 17.56 % in critical suction. This study provides theoretical support and engineering guidance for efficiently installing composite bucket foundations in offshore wind power applications.

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海上风力发电机组一体化安装中偏心荷载作用下复合桶形基础侵彻特性

针对海上风电复合桶形基础整体侵彻过程中偏心荷载对侵彻姿态控制的挑战，采用模型试验与数值模拟相结合的方法，系统研究了偏心荷载作用下的侵彻特性、渗流场演化及临界吸力机理。分析了不同偏心载荷大小和位置对侵彻特性的影响。结果表明，增加偏心载荷可降低侵彻阻力（比无偏心情况下降低约15%），并且通过三室补偿策略将载荷直接施加在单室上方可提高安装稳定性。研究表明，偏心荷载作用下土体超孔隙水压力分布不对称，补偿室外壁的负孔压损失比非补偿室减小约20%。临界渗流破坏发生在非补偿隔板与隔板之间的界面处。根据渗流路径与压差的关系，推导了考虑补偿室数、压差和侵深的临界吸力公式。结果表明，偏心载荷最大可使临界吸力降低17.56%。该研究为海上风电中高效安装复合式桶形基础提供了理论支持和工程指导。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Marine Structures 工程技术-工程：海洋

CiteScore

8.70

自引率

7.70%

发文量

157

审稿时长

6.4 months

期刊介绍： This journal aims to provide a medium for presentation and discussion of the latest developments in research, design, fabrication and in-service experience relating to marine structures, i.e., all structures of steel, concrete, light alloy or composite construction having an interface with the sea, including ships, fixed and mobile offshore platforms, submarine and submersibles, pipelines, subsea systems for shallow and deep ocean operations and coastal structures such as piers.