Numerical study of scour depth effect on wave-induced seabed response and liquefaction around a pipeline

doi:10.1080/1064119X.2019.1689588

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-)

	Numerical study of scour depth effect on wave-induced seabed response and liquefaction around a pipeline
	Li H 3; Wang SQ 3; Chen XG 3; Hu C(胡存)2; Liu JZ 1
刊名	MARINE GEORESOURCES & GEOTECHNOLOGY
	2019-11-13
页码	12
关键词	Pipeline liquefaction depth scour depth pore pressure response anisotropic seabed
ISSN号	1064-119X
DOI	10.1080/1064119X.2019.1689588
通讯作者	Wang, Shuqing(shuqing@ouc.edu.cn)
英文摘要	Wave-induced liquefaction depth is a key factor in providing the safe design of submarine pipelines. However, existing numerical studies simplify the seabed as a flat foundation and ignore the effect of scour depth on wave-induced seabed response and liquefaction depth. The effects of scour depth on wave-induced seabed response and liquefaction depth around a submarine pipeline are investigated, and a three-dimensional hybrid model combining Reynolds-averaged Navier-Stokes (RANS) equations with Biot's poroelastic theory for wave propagation and anisotropic seabed is proposed in this study. Numerical results indicate that local scour leads to the redistribution of the initial effective stress within the seabed around the pipeline. With increasing scour depths, the maximum liquefaction depth beneath the pipeline simultaneously decreases. When the scour depth reaches a certain depth, the seabed seems to no longer liquefy. Parametric studies indicate that the liquefaction depth increases by either decreasing the saturation degree or increasing the wave height. Under anisotropic seabed conditions, a nonlinear relationship exists between the maximum liquefaction depth of the seabed and the seabed permeability.
分类号	Q3
资助项目	National Science Fund for Distinguished Young Scholars[51625902] ; Taishan Scholars Program of Shandong Province[TS201511016] ; Taishan Scholars Program of Shandong Province[2016QNRC001]
WOS关键词	INDUCED PORE PRESSURES ; CIRCULAR-CYLINDER ; FLOW ; INSTABILITY ; GENERATION ; MECHANISM ; MODEL
WOS研究方向	Engineering ; Oceanography ; Mining & Mineral Processing
语种	英语
WOS记录号	WOS:000496379800001
资助机构	National Science Fund for Distinguished Young Scholars ; Taishan Scholars Program of Shandong Province
其他责任者	Wang, Shuqing
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/81403]
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.Hohai Univ, Minist Educ Geomech & Embankment Engn, Key Lab, Nanjing, Jiangsu, Peoples R China 2.Chinese Acad Sci, Inst Mech, Beijing, Peoples R China; 3.Ocean Univ China, Shandong Prov Key Lab Ocean Engn, Qingdao 266100, Shandong, Peoples R China;
推荐引用方式 GB/T 7714	Li H,Wang SQ,Chen XG,et al. Numerical study of scour depth effect on wave-induced seabed response and liquefaction around a pipeline[J]. MARINE GEORESOURCES & GEOTECHNOLOGY,2019:12.
APA	Li H,Wang SQ,Chen XG,胡存,&Liu JZ.(2019).Numerical study of scour depth effect on wave-induced seabed response and liquefaction around a pipeline.MARINE GEORESOURCES & GEOTECHNOLOGY,12.
MLA	Li H,et al."Numerical study of scour depth effect on wave-induced seabed response and liquefaction around a pipeline".MARINE GEORESOURCES & GEOTECHNOLOGY (2019):12.