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For the flaged structure used in the fully friction stir welded tank bulkhead of the next-generation launch vehicle, strain measurements are conducted at typical locations during the flange assembly, welding, repair welding, and hydrostatic testing processes. Additionally, finite element analysis (FEA) is performed to simulate the internal pressure loading of the tank bulkhead. The test results reveal significant non-uniform stress distribution in the flange fillet area after welding, while full stirring repair welding has a relatively small influence on the final stress level of the flange. Under internal pressure loading, the flange exhibit uneven stress distribution, leading to localized yielding at certain points. The experimental results validate the accuracy of the finite element method, demonstrating its applicability for evaluating the effectiveness of subsequent structural optimizations.
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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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