| Equilibrium scour depth at offshore monopile foundation in combined waves and current | |
Qi WG(漆文刚) ; Gao FP(高福平); Gao, FP (reprint author), Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing 100190, Peoples R China.
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| Source Publication | SCIENCE CHINA-TECHNOLOGICAL SCIENCES
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| 2014-05 | |
| Volume | 57Issue:5Pages:1030-1039 |
| ISSN | 1674-7321 |
| Abstract | Unlike the pier scour in bridge waterways, the local scour at offshore monopile foundations should take into account the effect of wave-current combination. Under the condition of wave-current coexistence, the water-soil interfacial scouring is usually coupled with the pore-pressure dynamics inside of the seabed. The aforementioned wave/current-pile-soil coupling process was physically modeled with a specially designed flow-structure-soil interaction flume. Experimental results indicate that superimposing a current onto the waves obviously changes the pore-pressure and the flow velocity at the bed around the pile. The concomitance of horseshoe vortex and local scour hole around a monopile proves that the horseshoe vortex is one of the main controlling mechanisms for scouring development under the combined waves and current. Based on similarity analyses, an average-velocity based Froude number (Fr (a)) is proposed to correlate with the equilibrium scour depth (S/D) at offshore monopile foundation in the combined waves and current. An empirical expression for the correlation between S/D and Fr (a) is given for predicting equilibrium scour depth, which may provide a guide for offshore engineering practice. |
| Keyword | Monopile Pore-pressure Scour Depth Combined Waves And Current Froude Number |
| Subject Area | Engineering ; Materials Science |
| URL | 查看原文 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000335903500021 |
| Funding Organization | This work was supported by the National Natural Science Foundation of China (Grant Nos. 11232012, 10872198) and the National Basic Research Program of China ("973" Project) (Grant No. 2014CB046204). |
| Department | LMFS流固土耦合力学(LHO) |
| Classification | 二类/Q2 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/48863 |
| Collection | 流固耦合系统力学重点实验室 |
| Corresponding Author | Gao, FP (reprint author), Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing 100190, Peoples R China. |
| Recommended Citation GB/T 7714 | Qi WG,Gao FP,Gao, FP . Equilibrium scour depth at offshore monopile foundation in combined waves and current[J]. SCIENCE CHINA-TECHNOLOGICAL SCIENCES,2014,57,5,:1030-1039. |
| APA | 漆文刚,高福平,&Gao, FP .(2014).Equilibrium scour depth at offshore monopile foundation in combined waves and current.SCIENCE CHINA-TECHNOLOGICAL SCIENCES,57(5),1030-1039. |
| MLA | 漆文刚,et al."Equilibrium scour depth at offshore monopile foundation in combined waves and current".SCIENCE CHINA-TECHNOLOGICAL SCIENCES 57.5(2014):1030-1039. |
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