Numerical study on hydrodynamic load and vibration of pipeline exerted by submarine debris flow

doi:10.1016/j.oceaneng.2021.109754

	Numerical study on hydrodynamic load and vibration of pipeline exerted by submarine debris flow
	Zhao, Enjin 1,2; Dong, Youkou 1,2; Tang, Yuezhao 1; Cui, Lan 3
刊名	OCEAN ENGINEERING
	2021-11-01
卷号	239 页码:20
关键词	Debris flow Submarine pipeline VOF Vibration frequency Hydrodynamic load Flow field
ISSN号	0029-8018
DOI	10.1016/j.oceaneng.2021.109754
英文摘要	Submarine debris flow, as one of the natural phenomena of marine disasters, often occurs in different sea areas, which has a strong impact on marine structure due to its large specific gravity and high velocity. Submarine pipeline is an important submarine structure which is extremely vulnerable to the marine environment, especially under the submarine debris flow. Many studies have been conducted on the interaction between the debris flow and the pipeline. Based on previous studies, the effects of the debris flows under the water-air interface on the pipeline with degree of freedom are investigated in this study where the debris flow volume, density, slide slope angle, the spring stiffness coefficient, pipeline location and tandem pipeline are considered. According to the computational fluid dynamics theory, a numerical tank is established using the Immersed Boundary (IB) method, in which the three-phase media (air, water and debris flow) are embedded. The results demonstrate that when the debris flow occurs, the water-air free surface is affected by the debris flow propagation, generating a surface wave. When the debris flow passes through the pipeline, with the increase of debris flow density and volume, the force on the pipeline increases, but the vibration frequency of pipeline decreases. Meanwhile, the vibrating pipeline will cause strong turbulence to the debris flow. In addition, the force and the vibration frequency of the pipeline are closely related to the flow pattern of debris flow reaching the pipeline. When the debris flow passes through the tandem pipeline, the closer the distance between the two pipelines is, the more significant the mutual influence between two pipelines is, because the negative pressure area formed behind the upstream pipeline can affect the downstream pipeline to a certain extent.
资助项目	National Natural Science Founda-tion of China of China[52001286] ; National Natural Science Founda-tion of China of China[51909248]
WOS研究方向	Engineering ; Oceanography
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000696968800002
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/27911]
专题	中科院武汉岩土力学所
通讯作者	Dong, Youkou
作者单位	1.China Univ Geosci, Coll Marine Sci & Technol, Wuhan 430074, Peoples R China 2.China Univ Geosci, Hubei Key Lab Marine Geol Resources, Wuhan 430074, Peoples R China 3.Chinese Acad Sci, Inst Rock & Soil Mech, Wuhan 430071, Peoples R China
推荐引用方式 GB/T 7714	Zhao, Enjin,Dong, Youkou,Tang, Yuezhao,et al. Numerical study on hydrodynamic load and vibration of pipeline exerted by submarine debris flow[J]. OCEAN ENGINEERING,2021,239:20.
APA	Zhao, Enjin,Dong, Youkou,Tang, Yuezhao,&Cui, Lan.(2021).Numerical study on hydrodynamic load and vibration of pipeline exerted by submarine debris flow.OCEAN ENGINEERING,239,20.
MLA	Zhao, Enjin,et al."Numerical study on hydrodynamic load and vibration of pipeline exerted by submarine debris flow".OCEAN ENGINEERING 239(2021):20.