A thermal-flutter criterion for an open thin-walled circular cantilever beam subject to solar heating |
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Authors: | Xiaode YUAN Zhihai XIANG |
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Institution: | Department of Engineering Mechanics, School of Aerospace Engineering, Tsinghua University, Beijing 100084, China |
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Abstract: | The flexible attachments of spacecraft may undergo Thermally Induced Vibration (TIV) on orbit due to the suddenly changed solar heating. The unstable TIV, called thermal-flutter, can cause serious damage to the spacecraft. In this paper, the coupled bending-torsion thermal vibration equations for an open thin-walled circular cantilever beam are established. By analyzing the stability of these equations based on the first Lyapunov method, the thermal-flutter criterion can be obtained. The criterion is very different form that of closed thin-walled beams because the torsion has great impact on the stability of the TIV for open thin-walled beams. Several numerical simulations are conducted to demonstrate that the theoretical predictions agree very well with the finite element results, which mean that the criterion are reliable. |
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Keywords: | Fourier finite element Stability criteria Thermal flutter Thermally Induced Vibration (TIV) Thin-walled structures |
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