利用Fluent流体力学CFD软件建立海底电缆冲刷的精细化水动力数值模型,以实测海流数据作为输入条件,模拟真实海况条件下的海缆冲刷过程,其次通过数据拟合获得海缆悬空长度和冲刷时长之间的定性定量关系,最后通过OrcaFlex水动力软件分析海缆裸露后的应力状态变化过程,判断海底电缆裸露后的运行安全状态。
Abstract
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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基金
广东省2021年促进经济高质量发展海洋经济专项（GDNRC[2021]41）
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