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Tidal currents-induced scour development around pile foundations: Effects of flow velocity hydrograph
Wang SY(王顺意)1,2; Qi WG(漆文刚)1,2; Li B(李彪)1,2; Wang C(王晨)3; Gao FP(高福平)1,2
通讯作者Qi, Wen-Gang([email protected])
发表期刊COASTAL ENGINEERING
2024-08-01
卷号191页码:20
ISSN0378-3839
摘要There is a lack of research in the existing literature regarding the scour around foundations for offshore wind turbines under tidal currents, which primarily relies on laboratory experiments with simplified flow velocity hydrographs like square tidal currents. To improve the prediction accuracy of scour development under tidal currents, a series of experiments were conducted to investigate the local scour process around a pile foundation under two typical tidal velocity hydrographs (sinusoidal and square tidal currents) in a specially designed fluidstructure -soil coupling flume. The results demonstrate that reciprocating tidal currents lead to a continuously evolving process of sediment erosion and backfilling around the pile. Although the shapes of the scour holes are similar between sinusoidal and square tidal currents, there are significant differences in the evolving process of the scour depth, presenting a short -platform shape and serrated shape, respectively. A consistent relationship is found between the dimensionless scour depth and the dimensionless effective flow work (DFW) under both tidal and unidirectional currents. An equivalent velocity expression for sinusoidal and square tidal currents is proposed and verified using existing experimental data. Furthermore, an empirical expression for the scour depth reduction coefficient between square tidal currents and unidirectional currents is proposed. These outcomes not only establish a theoretical approach for simplifying tidal currents hydrographs in laboratory experiments, but also provide practical guidance for assessing the tidal currents -induced scour development around pile foundations for in -situ offshore wind turbines.
关键词Local scour Tidal currents Pile foundation Flume experiment Dimensionless effective flow work Equivalent velocity
DOI10.1016/j.coastaleng.2024.104533
收录类别SCI ; EI
语种英语
WOS记录号WOS:001234958100001
关键词[WOS]LOCAL SCOUR ; COMBINED WAVES ; MONOPILE FOUNDATIONS ; SCALE
WOS研究方向Engineering
WOS类目Engineering, Civil ; Engineering, Ocean
资助项目National Natural Science Foundation of China[11972036] ; Youth Innovation Promotion As- sociation CAS[2021018] ; Open Research Fund of State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences[SKLGME022003]
项目资助者National Natural Science Foundation of China ; Youth Innovation Promotion As- sociation CAS ; Open Research Fund of State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences
论文分区一类
力学所作者排名1
RpAuthorQi, Wen-Gang
引用统计
被引频次:4[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://dspace.imech.ac.cn/handle/311007/95472
专题流固耦合系统力学重点实验室
作者单位1.Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China;
2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China;
3.Tongji Univ, Dept Geotech Engn, Shanghai 200092, Peoples R China
推荐引用方式
GB/T 7714
Wang SY,Qi WG,Li B,et al. Tidal currents-induced scour development around pile foundations: Effects of flow velocity hydrograph[J]. COASTAL ENGINEERING,2024,191:20.Rp_Au:Qi, Wen-Gang
APA 王顺意,漆文刚,李彪,王晨,&高福平.(2024).Tidal currents-induced scour development around pile foundations: Effects of flow velocity hydrograph.COASTAL ENGINEERING,191,20.
MLA 王顺意,et al."Tidal currents-induced scour development around pile foundations: Effects of flow velocity hydrograph".COASTAL ENGINEERING 191(2024):20.
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