Thermally induced vibration of a circular ring in consideration of the thermal gradient

WANG Xiang,JIN Dongping

Journal of Vibration and Shock ›› 2018, Vol. 37 ›› Issue (6) : 111-123.

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PDF(1273 KB)
Journal of Vibration and Shock ›› 2018, Vol. 37 ›› Issue (6) : 111-123.

Thermally induced vibration of a circular ring in consideration of the thermal gradient

  • WANG Xiang,JIN Dongping
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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 hooptruss structures used to support the antenna reflector, a coupled thermalstructural 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 RouthHurwitz 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.

Key words

hoop-truss structure / circular ring / coupled thermal-structural model / thermally induced vibration / stable region

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WANG Xiang,JIN Dongping. Thermally induced vibration of a circular ring in consideration of the thermal gradient[J]. Journal of Vibration and Shock, 2018, 37(6): 111-123

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