Predicting the Instability Trajectory of an Obliquely Loaded Pipeline on a Clayey Seabed

doi:10.3390/jmse10020299

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-)

	Predicting the Instability Trajectory of an Obliquely Loaded Pipeline on a Clayey Seabed
	Wang N(汪宁)1,2; Qi WG(漆文刚)1,2; Gao FP(高福平)1,2
刊名	JOURNAL OF MARINE SCIENCE AND ENGINEERING
	2022-02-01
卷号	10 期号:2 页码:21
关键词	deep-sea pipeline clayey seabed oblique load bearing capacity failure envelope critical pipe weight
DOI	10.3390/jmse10020299
通讯作者	Qi, Wengang(qiwengang@imech.ac.cn) ; Gao, Fuping(fpgao@imech.ac.cn)
英文摘要	Predicting the instability trajectory of an obliquely loaded pipeline on the seabed is vital for the global buckling assessment. To numerically investigate the obliquely loaded pipe-soil interactions, a plane strain elastoplastic finite element model incorporating the adaptive meshing technique and the contact-pair algorithm is employed and verified with the existing experimental data and the analytical predictions. The evolution of slip mechanisms within the underlying soil is simulated, indicating the instability direction of the pipe, and the corresponding ultimate soil resistance is closely correlated. It is also indicated that the ultimate load angle is in the positive correlation with the movement angle, the dimensionless embedment of the pipe and the roughness coefficient of the pipe-soil interface. On the basis of numerous simulations, a force-resultant plasticity model including the bearing capacity envelope and the flow rule is proposed for predicting the behavior of a partially embedded pipeline on the clayey seabed. Finally, an explicit expression with respect to the critical submerged weight of the pipe is derived for distinguishing the lateral instability of a pipe between the 'light' and the 'heavy' mode.
分类号	二类
资助项目	National Natural Science Foundation of China[11825205] ; National Natural Science Foundation of China[12061160463] ; Youth Innovation Promotion Association CAS[2021018]
WOS关键词	ULTIMATE BEARING CAPACITY ; FINITE-ELEMENT-ANALYSIS ; LINE FIELD SOLUTION ; SOIL INTERACTION ; EMBEDMENT ; PENETRATION ; MECHANISMS ; MODEL
WOS研究方向	Engineering ; Oceanography
语种	英语
WOS记录号	WOS:000774863500001
资助机构	National Natural Science Foundation of China ; Youth Innovation Promotion Association CAS
其他责任者	Qi, Wengang ; Gao, Fuping
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/88784]
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.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China;
推荐引用方式 GB/T 7714	Wang N,Qi WG,Gao FP. Predicting the Instability Trajectory of an Obliquely Loaded Pipeline on a Clayey Seabed[J]. JOURNAL OF MARINE SCIENCE AND ENGINEERING,2022,10(2):21.
APA	汪宁,漆文刚,&高福平.(2022).Predicting the Instability Trajectory of an Obliquely Loaded Pipeline on a Clayey Seabed.JOURNAL OF MARINE SCIENCE AND ENGINEERING,10(2),21.
MLA	汪宁,et al."Predicting the Instability Trajectory of an Obliquely Loaded Pipeline on a Clayey Seabed".JOURNAL OF MARINE SCIENCE AND ENGINEERING 10.2(2022):21.