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| Random Vibration Response Numerical Calculation of Thin-walled Connection Structures under Heat Flux Environment |
| Received:October 10, 2024 Revised:December 13, 2024 |
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| DOI：10.7643/issn.1672-9242.2025.03.007 |
| KeyWord:thin-walled connection structure heat-flux-solid coupling random vibration stress distribution modal frequency experimental verification |
| Author | Institution |
| LIU Shuang |
School of Aero-engine, Shenyang Aerospace University, Shenyang , China |
| SHA Yundong |
School of Aero-engine, Shenyang Aerospace University, Shenyang , China |
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| Abstract: |
| The work aims to investigate the stress response characteristics of thin-walled connection structures under thermal shock and random vibration environments. A high-temperature random vibration response analysis of thin-walled structures was carried out based on the nonlinear large deflection vibration theory, while combined thermal-vibration tests were conducted simultaneously. A random vibration response analysis of thin-walled connection structures in the thermal shock environment was performed based on the verified calculation and analysis method and the heat-flux-solid coupling theory. The base frequency error was less than 4%, and the axial stress error was less than 2.4%. With the increase in temperature, the peak of the stress response of the thin-walled connection structure shifts to the left, and the stress response trend remains unchanged. The flow rate within the range of 100-140 m/s has a relatively small influence on the stress response trend of the thin-walled connection structure. As the flow rate increases, the corresponding value of the structural stress increases slightly. The vibration level is positively correlated with the axial stress of the thin-walled connection structure. Moreover, as the vibration level increases, the structural stress changed significantly. The temperature range of 150-450 ℃ plays a dominant role in influencing the axial stress of the structure. |
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