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Stiffened plates are the basic structural units of a ship hull, and the safety and reliability of such structures are of paramount importance during service. Therefore, accurate acquisition of physical parameters such as stress and strain in stiffened plate structures through real-time monitoring techniques can provide data support for the safety assessment and prediction of ship hull structures. By employing the inverse finite element method (IFEM) based on the least squares variational principle, strain-field reconstruction of stiffened plate structures was conducted. Initially, numerical simulations were performed on axially-loaded stiffened plates, and the simulation results were then input into the inverse finite element algorithm for strain field reconstruction. By designing different measurement point layout schemes, the errors between the reconstructed results and the simulation results were analyzed. Moreover, the Xgboost algorithm was applied to provide guidance for the selection of discrete measurement point quantities and locations. The results indicate that IFEM is applicable to strain reconstruction in stiffened plate structures of ship hulls, and by optimizing the positions of measurement points, a significant reduction in quantity of measurement points in the inverse finite element model can be achieved while maintaining high-precision reconstruction results. The findings of this study can provide technical support for the health monitoring and safety assessment of ship hull 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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