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dc.contributor.authorJi, Guomin
dc.contributor.authorLi, Lanjing
dc.contributor.authorOng, Muk Chen
dc.date.accessioned2017-11-15T12:53:48Z
dc.date.available2017-11-15T12:53:48Z
dc.date.created2017-11-06T13:04:09Z
dc.date.issued2017-06-25
dc.identifier.citationASME 2017 36th International Conference on Ocean, Offshore and Arctic Engineering - Volume 5B: Pipelines, Risers, and Subsea Systemsnb_NO
dc.identifier.isbn978-0-7918-5770-0
dc.identifier.urihttp://hdl.handle.net/11250/2466466
dc.description.abstractThe objective of the paper is to study the effect of different parameters regarding on-bottom stability of subsea pipelines under combined irregular waves and currents. The effect of friction coefficient is first investigated. The development of lateral displacement and penetration for three different friction coefficients are compared for sandy and clayey seabed respectively when applied wave and current conditions are kept same for all the cases. The friction coefficient affects the soil resistance force and further changes the initial time when the pipeline starts to move in the lateral direction. The accumulated displacement reduces for large friction coefficient and it results in less penetration. The total effect of the increasing friction coefficient depends on the competition between the increased friction force and the reduced passive soil resistance force. The pipeline usually crosses different types of soil along the route. Hence, different combinations of soil types along the route are applied in the analysis. The soil property at middle of the pipeline is found to be important when the boundary conditions at both ends are fixed. Three analyzing procedures, namely standard 3-hour procedure, the procedure recommended by PONDUS and the procedure recommended by DNV, could be used for on-bottom stability analysis under storm conditions. The comparison of these procedures shows that the procedure recommended by PONDUS is the most appropriate for the storm conditions. The procedure recommended by DNV considers the build-up of initial penetration before the storm; and it could be applied in the analysis when the penetration is stabilized after the start -up time (20% of 3-hour).nb_NO
dc.language.isoengnb_NO
dc.publisherASME Digital collectionnb_NO
dc.relation.ispartofASME 2017 36th International Conference on Ocean, Offshore and Arctic Engineering - Volume 5B: Pipelines, Risers, and Subsea Systems
dc.relation.ispartofseriesASME Proceedings | Pipelines, Risers, and Subsea Systems;OMAE2017-61363
dc.subjectOn-bottom stabilitynb_NO
dc.subjectfriction coefficientnb_NO
dc.subjecthydrodynamic loadnb_NO
dc.subjectstorm condition and finite element analysisnb_NO
dc.titleOn-Bottom Stability Analysis of Subsea Pipelines Under Combined Irregular Waves and Currentsnb_NO
dc.typeChapternb_NO
dc.description.versionacceptedVersionnb_NO
dc.rights.holderCopyright © 2017 by ASMEnb_NO
dc.identifier.doi10.1115/OMAE2017-61363
dc.identifier.cristin1511297
cristin.unitcode7566,8,0,0
cristin.unitnameOcean Engineering
cristin.ispublishedtrue
cristin.fulltextpostprint
cristin.qualitycode1


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