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《中国航空学报(英文版)》 2018-09
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A thermal-flutter criterion for an open thin-walled circular cantilever beam subject to solar heating

Xiaode YUAN;Zhihai XIANG;Department of Engineering Mechanics,School of Aerospace Engineering,Tsinghua University;  
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.
【CateGory Index】: V414
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