Interaction between submarine landslides and suspended pipelines with a streamlined contour

被引：44
作者：
Fan, Ning [1 ]
Nian, Ting-kai [1 ,2 ]
Jiao, Hou-bin [1 ]
Jia, Yong-gang [3 ]
机构：
[1] Dalian Univ Technol, State Key Lab Coastal & Offshore Engn, Dalian 116024, Liaoning, Peoples R China
[2] China Univ Min & Technol, State Key Lab Geomech & Deep Underground Engn, Xuzhou 221008, Jiangsu, Peoples R China
[3] Ocean Univ China, Shandong Prov Key Lab Marine Environm & Geol Engn, Qingdao, Shandong, Peoples R China
来源：
MARINE GEORESOURCES & GEOTECHNOLOGY | 2018年 / 36卷 / 06期
基金：
中国国家自然科学基金;
关键词：
Computational fluid dynamics; drag force; lift force; streamlined pipelines; submarine landslides; DEBRIS FLOW IMPACT; FORCES; CLAY; SLIDE; SOIL;
D O I：
10.1080/1064119X.2017.1362084
中图分类号：
P75 [海洋工程];
学科分类号：
0814 ; 081505 ; 0824 ; 082401 ;
摘要：
Recently, the security and stability of submarine pipelines have attracted much attention in ocean engineering. In this paper, pipelines with a streamlined contour (wedge, airfoil, double-ellipse, and arc-angle hexagon) are designed in hopes of defending against the impact of submarine landslides, and the computational fluid dynamics (CFD) approach is used to investigate the interaction between submarine landslides and streamlined pipelines. The results show that the peak interactional force is more representative of the hazard level of pipelines imposed by submarine landslides. It is also found that the streamlined pipelines possess a significant advantage in reducing the drag force and lift force of landslide-pipeline interaction with a maximum lessening percentage of 66.32 and 40.17%, compared with a conventional circular pipeline. In addition, the influence of applying streamlined pipelines to engineering is briefly discussed, and the empirical equation for estimating the drag force and lift force of streamlined pipelines induced by landslides is recommended based on the numerical test results.
引用
收藏
页码：652 / 662
页数：11
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