Numerical modelling of liquefaction around marine structures in the OpenFOAM framework

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4. Numerical modelling of liquefaction around marine structures in the OpenFOAM framework

Enhanced understanding of the wave-induced response of the seabed around marine structures is essential for a more efficient exploitation of marine resources. Depending on the prevailing conditions, the seabed response can result in soil liquefaction, leading to catastrophic failure of marine structures. Therefore, accurate and efficient numerical models of wave-structure-soil interaction, capturing the hydrodynamic, structural, and geotechnical processes, are necessary for an optimised development of marine infrastructure. The project "Numerical modelling of liquefaction around marine structures" aims at developing an open-source numerical modelling framework for liquefaction around marine structures. This paper will present the state-of-the-art of numerically modelling the wave-induced seabed response and liquefaction. Furthermore, the paper will lay out the unique modelling framework for the entire liquefaction process, implemented in OpenFOAM^®, and provide details on the calibration and validation strategy using small and large scale experiments, respectively. Initial numerical results are shown for different stages of the liquefaction sequence, indicating promising agreement with reference data from the literature.

10th European Conference on Numerical Methods in Geotechnical Engineering (NUMGE2023)

2. Finite element, finite difference, discrete element, material point and other methods