| Coupled Flow-Seepage-Elastoplastic Modeling for Competition Mechanism between Lateral Instability and Tunnel Erosion of a Submarine Pipeline | |
Shi YM(师玉敏)1,2 ; Gao FP(高福平)1,2; Wang N(汪宁)1,2; Yin, Zhenyu3
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| Corresponding Author | Gao, Fuping(fpgao@imech.ac.cn) |
| Source Publication | JOURNAL OF MARINE SCIENCE AND ENGINEERING
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| 2021-08-01 | |
| Volume | 9Issue:8Pages:25 |
| Abstract | 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. |
| Keyword | submarine pipeline pipe-soil interaction flow-seepage-elastoplastic modeling on-bottom stability competition mechanism |
| DOI | 10.3390/jmse9080889 |
| Indexed By | SCI |
| Language | 英语 |
| WOS ID | WOS:000689569100001 |
| WOS Keyword | SOIL ; SCOUR ; CURRENTS ; ONSET ; SAND |
| WOS Research Area | Engineering ; Oceanography |
| WOS Subject | Engineering, Marine ; Engineering, Ocean ; Oceanography |
| Funding Project | 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] |
| Funding Organization | 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 |
| Classification | 二类 |
| Ranking | 1 |
| Contributor | Gao, Fuping |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/87375 |
| Collection | 流固耦合系统力学重点实验室 |
| Affiliation | 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.Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hung Hom, Kowloon, Hong Kong, Peoples R China |
| Recommended Citation 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. |
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| Jp2021F425.pdf（9160KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
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