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Numerical investigation of non-cohesive seabed response around a Mono-pile by crossing wave-current

Water Science and Engineering 2022年第1期15卷 57-68页

作者： Jie Lin Ya-kun Guo Xiamen Ocean Vocational College Xiamen 361012China Key Laboratory of Coastal Disaster and Defence of Ministry of Education Hohai UniversityNanjing 210098China Faculty of Engineering&Informatics University of BradfordBradford BD71DPUK

The interaction between waves and currents in the ocean often complicates the flow field around structures.In this study,a three-dimensional integrated numerical model was established to investigate the seabed response and liquefaction around a Mono-pile under different wave-current interaction angles.In the present model,the Reynolds-averaged Navier-Stokes equations were used to simulate the flow field,and the Biot's poro-elastic theory was adopted to calculate the seabed response caused by crossing wave-current loading.Unlike previous studies,the load on the Mono-pile was considered,and the wave-current interaction angle was extended to 180°,which was more in line with practical engineering problems.The numerical results were in a good agreement with the experimental measurements.The results indicated that waves interacted with currents in a large angle could result in a large momentary liquefaction depth of the seabed.The parametric studies proved that the position of the front and two sides of the pile was relatively safer compared with that of the leeside of the pile,and the surface of the seabed downstream of the pile was liable to liquefy.

关键词： Wave-current interaction Mono-pile Seabed response Liquefaction Wave-current model Seabed model

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Numerical analysis of seabed dynamic response in vicinity of Mono-pile under wave-current loading

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Water Science and Engineering 2020年第1期13卷 74-82页

作者： Jie Lin Ji-sheng Zhang Ke Sun Xing-lin Wei Ya-kun Guo Key Laboratory of Coastal Disaster and Defence(Hohai University) Ministry of EducationNanjing 210098China College of Harbor Coastal and Offshore EngineeringHohai UniversityNanjing 210098China Faculty of Engineering&Informatics University of BradfordBradford BD71DPUK

pile foundations have been widely used in offshore engineering.In this study,a three-dimensional numerical model was used to investigate the seabed response around a Mono-pile under wave-current loading.Reynolds-averaged Navier-Stokes equations were used to simulate the flow field,and Biot's consolidation equations were used for simulating the response of a porous seabed.The pore water pressure within soil and the effective stress along the depth of the seabed were simulated for various current velocities,with currents traveling either along or against the wave.Results indicate that the current has a significant effect on the effective stress and the pore water pressure distributions,which increases with the current velocity,and that the current traveling against the wave increases the liquefaction depth of the porous seabed.

关键词： Numerical simulation Dynamic response Wave-current loading Mono-pile foundation Porous seabed

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