A thermal-flutter criterion for an open thin-walled circular cantilever beam subject to solar heating

作     者：Xiaode YUAN Zhihai XIANG 

作者机构：Department of Engineering MechanicsSchool of Aerospace EngineeringTsinghua University 

出 版 物：《Chinese Journal of Aeronautics》 (中国航空学报（英文版）)

年 卷 期：2018年第31卷第9期

页      面：1902-1909页

核心收录：

学科分类：08[工学] 0825[工学-航空宇航科学与技术] 

主　　题：Fourier finite element Stability criteria Thermal flutter Thermally Induced Vibration(TIV) Thin-walled structures 

摘      要：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.