Numerical Study on Hydrodynamic Responses of Floating Rope Enclosure in Waves and Currents
Enclosure aquaculture is a healthy and ecological aquaculture pattern developed in recent years to relieve the pressure due to the wild fish stock decline and water pollution. The object of this paper was a floating rope enclosure, which mainly consisted of floaters, mooring lines, sinkers and a net...
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MDPI AG
2020-01-01
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| Series: | Journal of Marine Science and Engineering |
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| Online Access: | https://www.mdpi.com/2077-1312/8/2/82 |
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| author | Hui Yang Yun-Peng Zhao Chun-Wei Bi Yong Cui |
| author_facet | Hui Yang Yun-Peng Zhao Chun-Wei Bi Yong Cui |
| author_sort | Hui Yang |
| collection | DOAJ |
| description | Enclosure aquaculture is a healthy and ecological aquaculture pattern developed in recent years to relieve the pressure due to the wild fish stock decline and water pollution. The object of this paper was a floating rope enclosure, which mainly consisted of floaters, mooring lines, sinkers and a net. In order to optimize mooring design factors, the hydrodynamic responses of the floating rope enclosure with different mooring systems in combined wave-current were investigated by experimental and numerical methods. Physical model experiments with a model scale of 1:50 were performed to investigate the hydrodynamic characteristics of a floating rope enclosure with 12 mooring lines. Based on the lumped mass method, the numerical model was established to investigate the effects of mooring design factors on the mooring line tension, force acting on the bottom, and the volume retention of the floating rope enclosure. Through the analysis of numerical and experimental results, it was found that the maximum mooring line tension of the floating rope enclosure occurs on both sides of the windward. Increasing the number of mooring lines on the windward side is helpful to reduce the maximum mooring line tension. Waves and current both have an influence on the mooring line tension; in contrast, currents have a more obvious effect on the mooring line tension than waves. However, the influence of the wave period on the maximum mooring line tension is small. The force endured by the bottom of the floating rope enclosure also changes periodically with the wave period. Yet, the maximum force endured by the bottom of floating rope enclosure occurred at the windward and leeward of the structure. The volume retention of the floating rope enclosure increased with the increasing amount of mooring lines. |
| first_indexed | 2024-12-14T12:17:58Z |
| format | Article |
| id | doaj.art-d81629005b094f769e1b6b6dc7a6b325 |
| institution | Directory Open Access Journal |
| issn | 2077-1312 |
| language | English |
| last_indexed | 2024-12-14T12:17:58Z |
| publishDate | 2020-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Journal of Marine Science and Engineering |
| spelling | doaj.art-d81629005b094f769e1b6b6dc7a6b3252022-12-21T23:01:36ZengMDPI AGJournal of Marine Science and Engineering2077-13122020-01-01828210.3390/jmse8020082jmse8020082Numerical Study on Hydrodynamic Responses of Floating Rope Enclosure in Waves and CurrentsHui Yang0Yun-Peng Zhao1Chun-Wei Bi2Yong Cui3State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, ChinaState Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, ChinaState Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, ChinaPilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, ChinaEnclosure aquaculture is a healthy and ecological aquaculture pattern developed in recent years to relieve the pressure due to the wild fish stock decline and water pollution. The object of this paper was a floating rope enclosure, which mainly consisted of floaters, mooring lines, sinkers and a net. In order to optimize mooring design factors, the hydrodynamic responses of the floating rope enclosure with different mooring systems in combined wave-current were investigated by experimental and numerical methods. Physical model experiments with a model scale of 1:50 were performed to investigate the hydrodynamic characteristics of a floating rope enclosure with 12 mooring lines. Based on the lumped mass method, the numerical model was established to investigate the effects of mooring design factors on the mooring line tension, force acting on the bottom, and the volume retention of the floating rope enclosure. Through the analysis of numerical and experimental results, it was found that the maximum mooring line tension of the floating rope enclosure occurs on both sides of the windward. Increasing the number of mooring lines on the windward side is helpful to reduce the maximum mooring line tension. Waves and current both have an influence on the mooring line tension; in contrast, currents have a more obvious effect on the mooring line tension than waves. However, the influence of the wave period on the maximum mooring line tension is small. The force endured by the bottom of the floating rope enclosure also changes periodically with the wave period. Yet, the maximum force endured by the bottom of floating rope enclosure occurred at the windward and leeward of the structure. The volume retention of the floating rope enclosure increased with the increasing amount of mooring lines.https://www.mdpi.com/2077-1312/8/2/82floating rope enclosurehydrodynamic characteristicsmooring systemvolume retentionmooring line tension |
| spellingShingle | Hui Yang Yun-Peng Zhao Chun-Wei Bi Yong Cui Numerical Study on Hydrodynamic Responses of Floating Rope Enclosure in Waves and Currents Journal of Marine Science and Engineering floating rope enclosure hydrodynamic characteristics mooring system volume retention mooring line tension |
| title | Numerical Study on Hydrodynamic Responses of Floating Rope Enclosure in Waves and Currents |
| title_full | Numerical Study on Hydrodynamic Responses of Floating Rope Enclosure in Waves and Currents |
| title_fullStr | Numerical Study on Hydrodynamic Responses of Floating Rope Enclosure in Waves and Currents |
| title_full_unstemmed | Numerical Study on Hydrodynamic Responses of Floating Rope Enclosure in Waves and Currents |
| title_short | Numerical Study on Hydrodynamic Responses of Floating Rope Enclosure in Waves and Currents |
| title_sort | numerical study on hydrodynamic responses of floating rope enclosure in waves and currents |
| topic | floating rope enclosure hydrodynamic characteristics mooring system volume retention mooring line tension |
| url | https://www.mdpi.com/2077-1312/8/2/82 |
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