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Title:
Numerical study on the stratum's responses due to natural gas hydrate dissociation
Author: Lu L; Zhang XH(张旭辉); Lu XB(鲁晓兵)
Source: SHIPS AND OFFSHORE STRUCTURES
Issued Date: 2017
Volume: 12, Issue:6, Pages:775-780
Abstract: Natural gas hydrate (NGH) dissociation can cause many kinds of potential hazards. Dimensional analysis is used first to obtain the controlling factors for NGH dissociation-induced stratum's responses. And then the effects of the controlling factors on the deformation and stress distribution have then been numerically investigated. A simplified critical condition for judging the instability of gentle inclined stratum after NGH dissociation was proposed. It is shown that the maximum settlement is located near the upper part of the slide body while the soil uplifts near the lower part. The fast change of the stress and deformation is located at the interface between hydrate-bearing stratum (HBS) and over layer. The slope angle has the largest effects on the responses of the stratum. The effects of modulus and water depth on the stratum's instability are small. There is a critical extension length of dissociation zone over which landslide will occur which is determined by the strength parameters, slope angle, friction coefficient and height of the over layer.
Keyword: Gas hydrate ; dissociation zone ; slope instability ; deformation
Language: 英语
Indexed Type: SCI ; EI
Corresponding Author: Lu, XB (reprint author), Univ Chinese Acad Sci, Dept Engn Sci, Beijing, Peoples R China. ; Lu, XB (reprint author), Chinese Acad Sci, Inst Mech, Dept LMFS, Beijing, Peoples R China.
Correspondent Email: xblu@imech.ac.cn
DOI: 10.1080/17445302.2016.1241366
DOC Type: Article
WOS Subject: Engineering, Marine
WOS Subject Extended: Engineering
WOS Keyword Plus: SEA
WOS ID: WOS:000400763800004
ISSN: 1744-5302
Funder: National Natural Science Foundation of China [11272314, 51239010, 11102209] ; Project of CAS-CNPC Strategic Alliance
Rank: [Lu, L.] China Univ Min & Technol, Sch Sci, Fac Phys, Beijing, Peoples R China; [Zhang, X. H.; Lu, X. B.] Univ Chinese Acad Sci, Dept Engn Sci, Beijing, Peoples R China; [Zhang, X. H.; Lu, X. B.] Chinese Acad Sci, Inst Mech, Dept LMFS, Beijing, Peoples R China
Classification: 二类
Ranking: 1
Citation statistics:
Content Type: 期刊论文
URI: http://dspace.imech.ac.cn/handle/311007/72132
Appears in Collections:流固耦合系统力学重点实验室(2012-)_期刊论文

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Recommended Citation:
Lu L,Zhang XH,Lu XB. Numerical study on the stratum's responses due to natural gas hydrate dissociation[J]. SHIPS AND OFFSHORE STRUCTURES,2017-01-01,12(6):775-780.
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