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In cold regions, offshore wind turbine structures are susceptible to complex environmental loads, which can lead to vibrationrelated safety concerns. Taking a 6.45 MW offshore monopile wind turbine structure as an example, the vibration response of the structure under the combined action of wind and ice loads is analyzed and compared before and after the implementation of the MTMD (Multiple Tuned Mass Damper) system. The results indicate that the wind and ice loads induce severe vibration responses in the wind turbine tower, with the maximum displacement response occurring at the top of the tower and the maximum acceleration response near the amplitude point of the second mode of vibration. In addition to the first two natural frequencies, the wind and ice loads also excite higherorder responses in the tower structure. By employing an MTMD system that controls the first and second mode frequencies, the displacement, acceleration, and overturning moment responses of the tower structure can be effectively controlled, resulting in significant vibration reduction. However, it should be noted that the TMD (Tuned Mass Damper) device exhibits frequency sensitivity and cannot effectively mitigate vibration responses induced by higherorder frequencies of the structure.
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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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