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Numerical simulation of semi-submersible cage with mooring system
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Hao WU1, 2, Song ZHOU3, Qiang LIU4, Kai WANG1, 2, Jun YAN5
Journal of Ship Mechanics | 2025, 29(2) : 200 - 208
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Journal of Ship Mechanics | 2025, 29(2): 200-208
• Hydrodynamics •
Numerical simulation of semi-submersible cage with mooring system
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Hao WU1, 2, Song ZHOU3, Qiang LIU4, Kai WANG1, 2, Jun YAN5
Affiliations
  • 1.Sun Yat-sen University, Zhuhai 519082, China
  • 2.Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai 519082, China
  • 3.Southern Marine Science and Engineering Guangdong Laboratory (Zhanjiang), Zhanjiang 524006, China
  • 4.Guangzhou Shipyard International Company Limited, Guangzhou 511400, China
  • 5.Zhuhai Marine Equipment Research Institute Co., Ltd., Zhuhai 519085, China
Published: 2025-02-20 doi: 10.3969/j.issn.1007-7294.2025.02.004
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With aquaculture equipment gradually moving from offshore to deep sea, "Deep Blue 2", a semi-submersible and column-stabilized cage with a total aquaculture volume of about 90 000 cubic meters, came into existence. In order to study its hydrodynamic performance and characteristics of motion response under the irregular wave combined with steady air and current, a numerical model suitable for the time domain analysis of the cage was established by combining the WADAM, SIMO and RIFLEX solvers. The numerical model was coupled from the hydrodynamic model of the main structure of the "Deep Blue 2" and the finite element model of the nets and the mooring system. The panel model and Morrison model were combined to solve the hydrodynamic force of the cage. The finite element method was used to analyze the nets and mooring system in time domain where the nets load was computed based on the Screen model. The time domain simulation shows that the nets have a significant effect on the hydrodynamic performance of the cage, which cannot be ignored. The maximum mooring tension of the cage with nets is about twice that without nets, and the range of horizontal drift is also wider. The difference-frequency force components of second order wave force have little effect on the mooring tension and horizontal drift. These conclusions may be useful for the evaluation and optimization of the hydrodynamic performance of new cages.

"Deep Blue 2" cage  /  panel model  /  Morison model  /  Screen model  /  finite element method
Hao WU, Song ZHOU, Qiang LIU, Kai WANG, Jun YAN. Numerical simulation of semi-submersible cage with mooring system[J]. Journal of Ship Mechanics, 2025 , 29 (2) : 200 -208 . DOI: 10.3969/j.issn.1007-7294.2025.02.004
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Year 2025 volume 29 Issue 2
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doi: 10.3969/j.issn.1007-7294.2025.02.004
  • Receive Date：2024-08-23
  • Online Date：2026-03-24
  • Published：2025-02-20
Article Data
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  • Received：2024-08-23
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Affiliations
    1.Sun Yat-sen University, Zhuhai 519082, China
    2.Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai 519082, China
    3.Southern Marine Science and Engineering Guangdong Laboratory (Zhanjiang), Zhanjiang 524006, China
    4.Guangzhou Shipyard International Company Limited, Guangzhou 511400, China
    5.Zhuhai Marine Equipment Research Institute Co., Ltd., Zhuhai 519085, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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