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| Thermally induced vibration of a circular ring in consideration of the thermal gradient |
| WANG Xiang，JIN Dongping |
| State Key Laboratory of Mechanics and Control of Mechanical Structures，Nanjing University of Aeronautics and Astronautics, Nanjing 210016，China |
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Abstract Large space hoop structures are often simplified as space beams and circular rings to analytically investigate their thermally induced vibrations. For analysing the thermally induced vibration of hooptruss structures used to support the antenna reflector, a coupled thermalstructural model for the space circular ring was developed. Its approximate solution was derived by the weighted residual method, based on that the simplified system equation in state space was established. The stable region of the thermally induced vibration considering the effects of the incident angle of solar radiation and the structural damping was obtained by RouthHurwitz criterion. Finally, using an analysis method combining the Fourier thermal finite element and the structural finite element, the dynamic responses subjected to thermal shock were simulated numerically and the results were verified for different cases.
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Received: 14 October 2016
Published: 15 March 2018
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