极端海况下重力式网箱系泊系统数值模拟

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胡金鹏,张旋.极端海况下重力式网箱系泊系统数值模拟[J].,2021,61(6):615-622

极端海况下重力式网箱系泊系统数值模拟

Numerical simulation of gravity cage mooring system under extreme sea conditions

DOI：10.7511/dllgxb202106009

中文关键词:重力式网箱系泊系统水动力数值模型 OrcaFlex 极端海况

英文关键词:gravity cage mooring system hydrodynamic numerical model OrcaFlex extreme sea conditions

基金项目:福建省自然科学基金资助项目(2020J01695)；集美大学科研启动基金资助项目(C619043C619042).

作者	单位
胡金鹏,张旋

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中文摘要:

开展系泊系统水动力研究对于大型深海重力式网箱在恶劣海况条件下的长期使用具有重要意义．首先采用集中质量法构建重力式网箱系泊系统简化力学模型，基于海洋工程水动力分析软件OrcaFlex建立重力式网箱数值模型，并通过水池物理模型试验验证了在规则波工况下数值模拟结果的可靠性；进而针对钦州湾20 m水深的重力式网箱系泊系统开展了极端海况下的水动力数值研究，极端海况采用了百年一遇极端波浪条件，考虑网箱结构的对称性特点，代表性地分析了0°与45°两种浪向角下系泊缆绳张力变化的差异．研究结果表明，当浪向角为0°即平行于系泊系统中轴线时，缆绳张力幅值较小且受力均匀．研究结论对同类型重力式网箱系泊系统的科学布置具有一定的参考价值，并为大型深海重力式网箱的规模化运行提供前期研究基础．

英文摘要:

Carrying out mooring system hydrodynamic research is of great significance to the long term use of large deep sea gravity cages under severe sea conditions. Firstly the concentrated mass method was used to construct a simplified mechanical model of the gravity cage mooring system, then a numerical model of the cage was established based on the marine engineering hydrodynamic analysis software OrcaFlex. And the reliability of the numerical simulation results under regular wave conditions was verified by the physical model test in the tank. Furthermore, a numerical study of the hydrodynamics under extreme sea conditions was carried out for the gravity cage mooring system in Qinzhou Bay at a depth of 20 m. The extreme sea conditions adopted extreme wave conditions with the return period of one hundred years. Taking into account the symmetry of the mooring cage system, the difference in the tension of the mooring lines under the wave direction angles of 0° and 45° was analyzed. The results show that when the wave direction is parallel to the central axis of the mooring system, the rope tension amplitude is smaller and the force is more uniform. The research results can provide a certain reference for the scientific layout of the same type of the gravity cage mooring system, and a preliminary research basis for the large scale operation of large deep sea gravity cages.

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极端海况下重力式网箱系泊系统数值模拟

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