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Numerical analysis of seabed dynamic response around a four-bucket jacket foundation under combined wave-current loading.

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Title: Numerical analysis of seabed dynamic response around a four-bucket jacket foundation under combined wave-current loading.
Authors: Feng, Lingyun1,2 (AUTHOR), Wang, Qiuchen1 (AUTHOR), Liu, Junwei1 (AUTHOR), Liang, Zuodong3 (AUTHOR) liangzuodong@gxu.edu.cn, Asheghabadi, Mohsen Saleh1 (AUTHOR)
Source: Marine Georesources & Geotechnology. Jul2026, Vol. 44 Issue 7, p2184-2202. 19p.
Subjects: Soil liquefaction, Wave-current interaction, Numerical analysis, Offshore structures, Computational fluid dynamics, Building foundations
Abstract: Transient seabed liquefaction adjacent to marine structures under combined wave-current loading threatens offshore infrastructure stability. To address this, numerical investigations of wave-current-structure-seabed interactions are performed for a four-bucket jacket foundation using the open-source CFD platform OpenFOAM. This study systematically analyzes dynamic seabed responses and maximum transient liquefaction depths around the structure, with particular emphasis on wave height, wave period, current velocity/direction, and inter-bucket spacing. Key results reveal that maximum liquefaction depth increases with wave height/period and co-directional current velocity, yet decreases with reduced bucket spacing. Wave height dominates as the primary influencing factor. Furthermore, the spatial distribution of liquefaction depth around the foundation intensifies initially before gradual attenuation under combined wave-current conditions. Notably, forward-positioned buckets exhibit significantly higher susceptibility to liquefaction than rearward buckets. These findings offer valuable insights for stability assessment and protective design of offshore bucket jacket foundations. HIGHLIGHTS: A fully coupled numerical model examines wave-current-induced seabed dynamics and liquefaction depth around four-bucket jacket foundations. A systematic analysis evaluates the effects of wave height/period, current velocity/direction, and bucket spacing on seabed response. Parameter-dependent maximum liquefaction depth near foundations is quantified, offering key optimization guidelines for marine foundation design. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
Description
Abstract:Transient seabed liquefaction adjacent to marine structures under combined wave-current loading threatens offshore infrastructure stability. To address this, numerical investigations of wave-current-structure-seabed interactions are performed for a four-bucket jacket foundation using the open-source CFD platform OpenFOAM. This study systematically analyzes dynamic seabed responses and maximum transient liquefaction depths around the structure, with particular emphasis on wave height, wave period, current velocity/direction, and inter-bucket spacing. Key results reveal that maximum liquefaction depth increases with wave height/period and co-directional current velocity, yet decreases with reduced bucket spacing. Wave height dominates as the primary influencing factor. Furthermore, the spatial distribution of liquefaction depth around the foundation intensifies initially before gradual attenuation under combined wave-current conditions. Notably, forward-positioned buckets exhibit significantly higher susceptibility to liquefaction than rearward buckets. These findings offer valuable insights for stability assessment and protective design of offshore bucket jacket foundations. HIGHLIGHTS: A fully coupled numerical model examines wave-current-induced seabed dynamics and liquefaction depth around four-bucket jacket foundations. A systematic analysis evaluates the effects of wave height/period, current velocity/direction, and bucket spacing on seabed response. Parameter-dependent maximum liquefaction depth near foundations is quantified, offering key optimization guidelines for marine foundation design. [ABSTRACT FROM AUTHOR]
ISSN:1064119X
DOI:10.1080/1064119X.2026.2616293