高电压技术2023，Vol.49Issue(12)：4960-4970,11.DOI:10.13336/j.1003-6520.hve.20230132
基于嵌套网格方法的悬跨海缆涡激振动特性仿真
Vortex-induced Vibration Characteristic Simulation of Suspended Submarine Cable Based on Nested Grid Method
摘要
Abstract
Due to the long-term erosion of ocean currents,the submarine cable buried on the surface of the seabed tends to form suspended sections whose length and height gradually develop over time.When the suspended length of the subma-rine cable reaches a certain value,the shedding frequency of the vortex behind the cable will be close to the natural frequency of the cable,and frequency locking will occur.The amplitude of the submarine cable in the locked state is rela-tively large,which can easily lead to damage to the lead sheath.Therefore,in this paper,the coupling effect of downstream direction and transverse direction is taken into account,and a two-dimensional spring-damper vortex vibra-tion model is established.Meanwhile,the slice method based on a nested grid is adopted to analyze the vortex-induced vibration response of the suspended submarine cable under the influence of different parameters.The simulation results show that the lateral displacement of ViV of the submarine cable is much larger than the amplitude of ViV in the down-stream direction at the same reduced speed,whereas,the vibration frequency of ViV in the downstream direction is nearly twice that in the transverse direction.The maximum amplitude in the transverse direction of the cable is close to the di-ameter of the cable.The end restraint mode and suspension length mainly affect the minimum velocity of the cable entering the locked region but have a negligible influence on the maximum amplitude in the two directions.关键词
海底电缆/涡激振动/流固耦合/嵌套网格/位移响应Key words
submarine cable/vortex-induced vibration/fluid-structure interaction/nested grid/displacement response引用本文复制引用
祝贺,陈文龙,曹煜锋,韩兆冰,刘城..基于嵌套网格方法的悬跨海缆涡激振动特性仿真[J].高电压技术,2023,49(12):4960-4970,11.基金项目
吉林省科技厅项目(20230203136SF).Project supported by Science and Technology Department of Jilin Province(20230203136SF). （20230203136SF）
