Dynamic analysis of an array of semi-rigid “sea station” fish cages subjected to waves |
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| Institution: | 1. College of Ocean Engineering, Guangdong Ocean University, Guangdong 524088, China;2. College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, China;3. Centre for Marine Technology and Ocean Engineering (CENTEC), Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal;1. Cetaqua, Centro Tecnológico del Agua, Los Pozos, 7340, Santiago, Chile;2. Salmones Blumar S.A., Puerto Montt, Chile;1. National Marine Hazard Mitigation Service, Ministry of Natural Resources, Beijing, China, 100000;2. Marine Monitoring and Forecasting Center of Zhejiang, Hangzhou, China, 310000;3. Dalian University of Technology, Dalian, China, 116000;4. Ningbo Research Institute of Dalian University of Technology, China;1. State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024,China;2. Marine Science and Technology School, Zhejiang Ocean University, Zhoushan 316000, China;1. State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China;2. Civil Engineering, Dalian Ocean University, Dalian 116023, China |
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| Abstract: | The dynamic behaviour of an array of 6 × 6 semi-rigid “sea station” fish cages is studied under the effect of waves. The semi-rigid sea station system is discretized into a lumped mass model, that is used as the dynamic simulation model. The tension in the mooring lines of the mooring system is obtained in the time domain for different wave directions. The rotations of three degrees of freedom of each semi-rigid sea station under different wave directions are analysed, and the spectral density function of the mooring tension is obtained by Fast Fourier Transform of the time domain response. The results provide a basis for the design of the semi-rigid sea station system and have a certain guiding significance for the specific engineering practice. |
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| Keywords: | Semi-rigid sea station array Dynamic analysis OrcaFlex Lumped mass method |
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