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http://dx.doi.org/10.5574/KSOE.2017.31.3.219

Impact Characteristics of Subsea Pipeline Considering Seabed Properties and Burial Depth  

Shin, Mun-Beom (Department of Ocean Engineering, Korea Maritime and Ocean University)
Seo, Young-kyo (Department of Ocean Engineering, Korea Maritime and Ocean University)
Publication Information
Journal of Ocean Engineering and Technology / v.31, no.3, 2017 , pp. 219-226 More about this Journal
Abstract
In this study, the impact characteristics of subsea pipelines that were installed in various soil types and burial depths were evaluated by a numerical method. An impact scenario replicated a dropped ship anchor that fell vertically and impacted an installed subsea pipeline. In order to calculate the impact force through terminal velocity, FLUENT, a computational fluid dynamic program and MDM (Moving Deforming Mesh) technique were applied. Next, a dynamic finite element program, ANSYS Explicit Dynamics, was used for impact analysis between the anchor and pipeline (or, subsea if they were buried). Three soil types were considered: loose sand, dense sand and soft clay by applying the Mohr-coulomb model to the seabed. The buried depth was assumed to be 0 m, 1 m and 2 m. In conclusion, a subsea pipeline was the most stable when buried in dense sand at a depth of 2 m to prevent impact damage.
Keywords
Anchor; Terminal velcocity; Seabed; Subsea pipeline; Impact; MDM(Moving deforming mesh)method; Computational fluid dynamics; Finite elements method;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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