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With the long-term service of a semi-submersible platform at sea, the basic design parameters of the platform will change. If the platform is still analyzed based on the original design parameters, the accuracy of the results will be affected. In this paper, the basic parameters (displacement, center of gravity height and three-degree-of-freedom radius of rotation) that are easy to change during the service of a semi-submersible platform were taken as the updating parameters, the objective function was constructed by the variances, and wave frequency power spectral density of platform roll, pitch and heave, and a Bayesian parameter updating method of semi-submersible platform based on the monitoring data was established. With the monitoring data of a semi-submersible platform in China taken as an example, the parameter updating of the platform was carried out, and based on the updated parameters, the response of the platform under a multi-year return period environmental load was compared and evaluated.
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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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