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| Anti-loosening Test of Composites and High-temperature Alloy Bolt Connection Structure under High-temperature and Vibration Circumstance |
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| DOI：10.7643/issn.1672-9242.2023.03.005 |
| KeyWord:composite material high-temperature alloy bolt high temperature vibration thermal adaptation anti-loosening test |
| Author | Institution |
| QIU Heng-bin |
Beijing Institute of Structure and Environment Engineering, Beijing , China |
| LIU Xiao-hua |
Science and Technology on Space Physics Laboratory, Beijing , China |
| XIAO Nai-feng |
Beijing Institute of Structure and Environment Engineering, Beijing , China |
| WU Xiao-feng |
Beijing Institute of Structure and Environment Engineering, Beijing , China |
| CHEN Lu |
Beijing Institute of Structure and Environment Engineering, Beijing , China |
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| Abstract: |
| The work aims to conduct anti-loosening test of temperature compensation gaskets and disc gaskets, which are two forms of composites and high-temperature alloy bolted connection structures in high-temperature vibration environment. The relationship between the pretension force of the connection structure and the natural frequency was derived, indicating that the change of the natural frequency could be used as a criterion for whether the connection structure was loose. The effects of bolt pretension force on the natural frequency of composite connection structure in normal temperature environment were studied. And the thermal anti-loosening effects of temperature compensation gasket and disc gasket in normal temperature and high-temperature vibration environment were studied. The test results showed that the anti-loosening effect of the two forms of anti-loosening was close in the ambient vibration environment, and the anti-loosening effect of the temperature compensation gasket scheme was better than that of the disc gasket scheme in the high-temperature vibration environment. It is concluded that the thermal adaptation problem caused by the inconsistency of the thermal expansion coefficients of the two kinds of composite materials and high-temperature alloy bolts is the main reason for the loosening of the bolts. |
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