Tidal currents-induced scour development around pile foundations: Effects of flow velocity hydrograph
文献类型：期刊论文
| 作者 | Wang, Shun-Yi2,3 ; Qi, Wen-Gang2,3; Li, Biao2,3; Wang, Chen1; Gao, Fu-Ping2,3; Gao FP(高福平); Qi WG(漆文刚); Wang SY(王顺意)
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| 刊名 | COASTAL ENGINEERING
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| 出版日期 | 2024-08-01 |
| 卷号 | 191页码:20 |
| 关键词 | Local scour Tidal currents Pile foundation Flume experiment Dimensionless effective flow work Equivalent velocity |
| ISSN号 | 0378-3839 |
| DOI | 10.1016/j.coastaleng.2024.104533 |
| 通讯作者 | Qi, Wen-Gang(qiwengang@imech.ac.cn) |
| 英文摘要 | 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. |
| WOS关键词 | LOCAL SCOUR ; COMBINED WAVES ; MONOPILE FOUNDATIONS ; SCALE |
| 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] |
| WOS研究方向 | Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001234958100001 |
| 资助机构 | 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 |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/95471]  |
| 专题 | 力学研究所_流固耦合系统力学重点实验室(2012-) |
| 通讯作者 | Qi, Wen-Gang |
| 作者单位 | 1.Tongji Univ, Dept Geotech Engn, Shanghai 200092, Peoples R China 2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Shun-Yi,Qi, Wen-Gang,Li, Biao,et al. Tidal currents-induced scour development around pile foundations: Effects of flow velocity hydrograph[J]. COASTAL ENGINEERING,2024,191:20. |
| APA | Wang, Shun-Yi.,Qi, Wen-Gang.,Li, Biao.,Wang, Chen.,Gao, Fu-Ping.,...&王顺意.(2024).Tidal currents-induced scour development around pile foundations: Effects of flow velocity hydrograph.COASTAL ENGINEERING,191,20. |
| MLA | Wang, Shun-Yi,et al."Tidal currents-induced scour development around pile foundations: Effects of flow velocity hydrograph".COASTAL ENGINEERING 191(2024):20. |
入库方式： OAI收割
来源：力学研究所
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