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Two-Dimensional Numerical Study of Seabed Response around a Buried Pipeline under Wave and Current Loading
Open AccessArticle

Meshfree Model for Wave-Seabed Interactions Around Offshore Pipelines

1
School of Engineering and Built Environment, Griffith University Gold Coast Campus, Queensland 4222, Australia
2
Department of Marine Environmental Engineering, National Kaohsiung University of Science and Technology, Kaohsiung 824, Taiwan
3
Department of Marine Environment and Engineering, National Sun Yat-Sen University, Kaohsiung 804, Taiwan
*
Author to whom correspondence should be addressed.
J. Mar. Sci. Eng. 2019, 7(4), 87; https://doi.org/10.3390/jmse7040087
Received: 26 February 2019 / Revised: 21 March 2019 / Accepted: 22 March 2019 / Published: 28 March 2019
(This article belongs to the Special Issue Coastal Geohazard and Offshore Geotechnics)
The evaluation of the wave-induced seabed instability around a submarine pipeline is particularly important for coastal engineers involved in the design of pipelines protection. Unlike previous studies, a meshfree model is developed to investigate the wave-induced soil response in the vicinity of a submarine pipeline. In the present model, Reynolds-Averaged Navier-Stokes (RANS) equations are employed to simulate the wave loading, while Biot’s consolidation equations are adopted to investigate the wave-induced soil response. Momentary liquefaction around an offshore pipeline in a trench is examined. Validation of the present seabed model was conducted by comparing with the analytical solution, experimental data, and numerical models available in the literature, which demonstrates the capacity of the present model. Based on the newly proposed model, a parametric study is carried out to investigate the influence of soil properties and wave characteristics for the soil response around the pipeline. The numerical results conclude that the liquefaction depth at the bottom of the pipeline increases with increasing water period (T) and wave height (H), but decreases as backfilled depth ( H b ), degree of saturation ( S r ) and soil permeability (K) increase. View Full-Text
Keywords: oscillatory liquefaction; wave-soil-pipeline interactions; meshfree model; local radial basis functions collocation method oscillatory liquefaction; wave-soil-pipeline interactions; meshfree model; local radial basis functions collocation method
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MDPI and ACS Style

Wang, X.X.; Jeng, D.-S.; Tsai, C.-C. Meshfree Model for Wave-Seabed Interactions Around Offshore Pipelines. J. Mar. Sci. Eng. 2019, 7, 87.

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