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Springing and whipping have a non-negligible effect on the structural strength and fatigue life of containerships, and they have also been the focus and attention of researchers, of which linear springing is a more unique fluid-structure interaction phenomenon. In this paper, the ship motion and structural response in the linear springing state in waves of a 20,000 TEU containership model with a scaling ratio of 1∶49 were investigated by using both model tests and numerical calculations. The motion and sectional bending moment of the model were measured in the wave tank, and the numerical calculation was realized by two-way coupling of computational structural dynamics and CFD taking into account the fluid viscosity, and the effectiveness of the coupling method was verified by comparing the calculation results with the experimental data. The results of the ship motion and structural response under linear springing are analyzed, and it is found that the linear springing does not have much effect on the ship motion, but it will significantly enhance the structural sectional loads, the elastic resonance makes the structural response to be concentrated in the two-node vibration. The structural response obtained based on the rigid body is much smaller than that of the experimental and flexible body results, so the dynamic elastic coupling phenomenon between the hull and the surrounding flow field needs to be taken into account in the assessment of the ship's strength and fatigue performance.
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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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