In order to explore the regularity of dynamic response of stiffened plates under slamming load and establish static equivalent design method of stiffened plates, which covers the moving characteristics of slamming pressure and the dynamic response characteristics of stiffened plates, the slamming load acting on the flared bow is simplified in this paper into a moving pulse time history which rises linearly and decays exponentially. By using Abaqus finite element software, the elastic dynamic response of multiple stiffened plates under moving slamming load is calculated and the influence of different load parameters on the dynamic response of stiffened plates was analyzed. The Dynamic Load Factor DLF(Dynamic stress equivalent factor) was introduced to analyze the variation rule and sensitivity of DLF and the dimensionless parameters of slamming load. The regression and verification of DLF formula were carried out. A parameter determination method of the simplified slamming pressure model is proposed. The comparison with the results of wedge drop test shows that the proposed slamming stress equivalentizing formula DLF has higher precision and can effectively improve the efficiency of the preliminary design of ship structure under slamming load.
| 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 |