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Fishnet is a complicated flexible structure, and the drag force coefficient is important for the cage netting load calculation and deformation in the numerical simulation. Firstly, the actual netting samples were obtained through the netting patch hanging test in the open sea area, then they were studied in the laboratory to determine the drag coefficient under different marine growth conditions. The equivalent method of the netting in Morrison model was introduced in the numerical simulation to analyze the hydrodynamic load of the fishnet on the 50,000-cubic meter huge aquaculture cage. The results show that the cage netting load under large amounts of marine growth (solidity=0.69) can be 60% higher than that of the netting under small amounts of marine growth (solidity=0.28), and that the design size of the net rope can be reduced by optimizing the layout of the netting in the cage design.
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| 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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