Coupled Flow-Seepage-Elastoplastic Modeling for Competition Mechanism between Lateral Instability and Tunnel Erosion of a Submarine Pipeline

doi:10.3390/jmse9080889

CORC > 力学研究所 > 中国科学院力学研究所 > 流固耦合系统力学重点实验室(2012-)

	Coupled Flow-Seepage-Elastoplastic Modeling for Competition Mechanism between Lateral Instability and Tunnel Erosion of a Submarine Pipeline
	Shi YM(师玉敏)2,3; Gao FP(高福平)2,3; Wang N(汪宁)2,3; Yin, Zhenyu 1
刊名	JOURNAL OF MARINE SCIENCE AND ENGINEERING
	2021-08-01
卷号	9 期号:8 页码:25
关键词	submarine pipeline pipe-soil interaction flow-seepage-elastoplastic modeling on-bottom stability competition mechanism
DOI	10.3390/jmse9080889
通讯作者	Gao, Fuping(fpgao@imech.ac.cn)
英文摘要	The instability of a partially embedded pipeline under ocean currents involves complex fluid-pipe-soil interactions, which may induce two typical instability modes; i.e., the lateral instability of the pipe and the tunnel erosion of the underlying soil. In previous studies, such two instability modes were widely investigated, but separately. To reveal the competition mechanism between the lateral instability and the tunnel erosion, a coupled flow-seepage-elastoplastic modeling approach was proposed that could realize the synchronous simulation of the pipe hydrodynamics, the seepage flow, and elastoplastic behavior of the seabed soil beneath the pipe. The coupling algorithm was provided for flow-seepage-elastoplastic simulations. The proposed model was verified through experimental and numerical results. Based on the instability criteria for the lateral instability and tunnel erosion, the two instability modes and their corresponding critical flow velocities could be determined. The instability envelope for the flow-pipe-soil interaction was established eventually, and could be described by three parameters; i.e., the critical flow velocity (U-cr), the embedment-to-diameter ratio (e/D), and the non-dimensional submerged weight of the pipe (G). There existed a transition line on the envelope when switching from one instability mode to the other. If the flow velocity of ocean currents gets beyond the instability envelope, either tunnel erosion or lateral instability could be triggered. With increasing e/D or concurrently decreasing G, the lateral instability was more prone to being triggered than the tunnel erosion. The present analyses may provide a physical insight into the dual-mode competition mechanism for the current-induced instability of submarine pipelines.
分类号	二类
资助项目	China National Science Fund for Distinguished Young Scholars[11825205] ; National Natural Science Foundation of China (NSFC)/Research Grants Council (RGC) of Hong Kong Joint Research Scheme[12061160463] ; National Natural Science Foundation of China (NSFC)/Research Grants Council (RGC) of Hong Kong Joint Research Scheme[N_PolyU534/20] ; China Postdoctoral Science Foundation[2020M680691]
WOS关键词	SOIL ; SCOUR ; CURRENTS ; ONSET ; SAND
WOS研究方向	Engineering ; Oceanography
语种	英语
WOS记录号	WOS:000689569100001
资助机构	China National Science Fund for Distinguished Young Scholars ; National Natural Science Foundation of China (NSFC)/Research Grants Council (RGC) of Hong Kong Joint Research Scheme ; China Postdoctoral Science Foundation
其他责任者	Gao, Fuping
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/87374]
专题	力学研究所_流固耦合系统力学重点实验室(2012-)
作者单位	1.Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hung Hom, Kowloon, Hong Kong, 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	Shi YM,Gao FP,Wang N,et al. Coupled Flow-Seepage-Elastoplastic Modeling for Competition Mechanism between Lateral Instability and Tunnel Erosion of a Submarine Pipeline[J]. JOURNAL OF MARINE SCIENCE AND ENGINEERING,2021,9(8):25.
APA	师玉敏,高福平,汪宁,&Yin, Zhenyu.(2021).Coupled Flow-Seepage-Elastoplastic Modeling for Competition Mechanism between Lateral Instability and Tunnel Erosion of a Submarine Pipeline.JOURNAL OF MARINE SCIENCE AND ENGINEERING,9(8),25.
MLA	师玉敏,et al."Coupled Flow-Seepage-Elastoplastic Modeling for Competition Mechanism between Lateral Instability and Tunnel Erosion of a Submarine Pipeline".JOURNAL OF MARINE SCIENCE AND ENGINEERING 9.8(2021):25.