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Indexed by:期刊论文

Date of Publication:2015-02-01

Journal:OCEAN ENGINEERING

Included Journals:SCIE

Volume:95

Page Number:116-127

ISSN No.:0029-8018

Key Words:Submarine landslide; Debris flow; Impact; Drag force; Computational fluid dynamics (CFD); Offshore pipelines

Abstract:Impact forces induced by submarine landslides on pipelines are estimated using a computational fluid dynamics (CFD) approach. It is found that the predicted forces using the CFD approach are consistent with those predicted using the conventional geotechnical approach. It is also found that the impact angle of the debris flow induced by landslides affects the normal drag factor but hardly has any effect on the longitudinal drag factor. Empirical formulae for estimating normal and axial impact forces on a free spanned pipeline induced by an oblique debris flow are developed based on numerical test results. A new failure envelope that can be used in conventional geotechnical approaches is also obtained based on the numerical test results. (C) 2014 Elsevier Ltd. All rights reserved.