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| Parallel Fatigue Test Technology of Multiple Structures in Ultra-high Pressure Deep-sea Environment |
| Received:May 19, 2023 Revised:July 02, 2023 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/issn.1672-9242.2023.09.014 |
| KeyWord:ultrahigh pressure multiple structure parallel processing titanium alloy spherical shell fatigue test |
| Author | Institution |
| XIE Xiao-zhong |
China Ship Scientific Research Center, Jiangsu Wuxi , China |
| CHEN Sha-gu |
China Ship Scientific Research Center, Jiangsu Wuxi , China |
| GAO Yuan |
China Ship Scientific Research Center, Jiangsu Wuxi , China |
| HUANG Ru-xu |
China Ship Scientific Research Center, Jiangsu Wuxi , China |
| LI Yan-qing |
China Ship Scientific Research Center, Jiangsu Wuxi , China |
| HU Jia-jun |
China Ship Scientific Research Center, Jiangsu Wuxi , China |
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| Abstract: |
| The work aims to conduct fatigue tests of two manned capsules of the whole sea deep manned submersible. The stress state of the spherical shell under the action of pressure difference method and external pressure alone was compared and analyzed by theoretical method, and the feasibility of simulating the working environment of the spherical shell under ultra-high pressure deep sea was verified by the pressure difference method. At the same time, to reduce the damage of the test equipment caused by the external alternating load of the spherical shell and effectively shorten the test duration, a multi-structure parallel fatigue test technology was proposed, which took into account the ultra-high pressure deep-sea environment and adopted the internal and external pressure difference method. Based on this technology, the two-ball series fatigue test with nearly 7 000 cycles was carried out, which effectively ensured the development period of the whole sea deep-sea manned submersible. The test results show that this technology is effective and reliable for a long time, and can provide technical basis and application reference for the same type of tests. |
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