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The interaction between level ice and offshore pile structures is a complex process, which often involves the breaking, failure and accumulation of sea ice. The issure of level ice failure is essentially a problem related to brittle failure of ice materials. However, the failure mechanism of traditional finite element method has great limitations in this problem, which cannot reasonably reflect the deformation and motion state of broken ice. Therefore, it is necessary to explore the existing numerical simulation technology and establish a reasonable modeling method to solve the key points related to level ice damage problems. In this paper, a user-defined constitutive model was introduced to simulate mechanical properties of sea ice material, and the cohesive elements were used to refect the generation and propagation of ice cracks. Through the simulation of the interaction between pile structures and level ice, the failure mode of ice material and the interaction load between pile structures and level ice were analyzed, and the reliability of the proposed method was verified by comparing with the relevant model tests. The results show that the method used in this paper can effectively simulate the compression and bending failure of level ice under the action of pile structures, and the ice load can be accurately predicted. The relevant conclusions are of great significance for ice load prediction and the structure design of offshore pile structures.
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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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