The analysis and research of local erosion and stress state of submarine cables is crucial for the reliable operation of offshore wind farms.During the laying process of submarine cables,the seabed topography may occur the local changes,leading to changes in the hydrodynamic boundary conditions of the seabed,causing imbalanced sediment transport in the surrounding area of the buried submarine cables.When the submarine cables are exposed,the erosion phenomenon will gradually strengthen,and even cause stress damage due to the large suspension of the submarine cables.Firstly,this article first uses Fluent fluid dynamics CFD software to establish a refined hydrodynamic numerical model of submarine cable erosion,using measured ocean current data as input conditions to simulate the process of submarine cable erosion under real sea conditions.Secondly,the qualitative and quantitative relationship between the suspended length of submarine cables and the duration of erosion is obtained through data fitting.Finally,the stress state change process of submarine cables after exposure is analyzed using OrcaFlex hydrodynamic software.The research results of this article can provide a certain scientific basis for the reliable operation of submarine cables in offshore wind farms.
关键词
海底电缆/海上风电场/数值模型/局部冲刷/应力状态
Key words
submarine cable/offshore wind farms/numerical model/local scouring/stress state
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