Full
Outline
To address the difficulty in accurately assessing the fatigue life of welded structures, a multi-fatigue-parameter coupled equivalent structural stress evaluation method is adopted. Based on material constitutive relations, mechanical principles, and numerical analysis, an original algorithm for the fatigue life assessment of welded structures is developed, and a quantitative mapping relationship between equivalent structural stress and fatigue damage under multiaxial stress states is established. By combining multi-channel quasi-static superposition technology and integrating rainflow counting and the Miner cumulative damage model, fatigue simulation analysis software suitable for engineering applications is developed through independent programming. A welding simulation case validates the good mesh insensitivity of the software, effectively solving the technical problem of mesh-size sensitivity in traditional industry simulation methods. Through systematic simulation benchmarking of fatigue failure cases, it is demonstrated that the proposed analysis method can accurately predict the fatigue failure risk of welded structures, and the fatigue life prediction accuracy is substantially improved compared with traditional industry simulation methods.
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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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