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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2019, Vol. 40 ›› Issue (11): 223135-223135.doi: 10.7527/S1000-6893.2019.23135

• Solid Mechanics and Vehicle Conceptual Design • Previous Articles     Next Articles

Thermally-induced vibration of a solar sail in earth orbit

ZHANG Junhui1, TONG An1, WU Na1, LIU Yinghua2   

  1. 1. School of Civil Engineering, North China University of Technology, Beijing 100144, China;
    2. School of Aerospace Engineering, Tsinghua University, Beijing 100084, China
  • Received:2019-05-07 Revised:2019-05-24 Online:2019-12-03 Published:2019-06-24
  • Supported by:
    National Natural Science Foundation of China (11572001)

Abstract: When solar sails are orbiting earth, the day-night transits will cause sudden change of thermal environment of solar sails. Thermally-induced structural response of solar sails due to this thermal shock is worth studying. Considering the nonlinear effect of heat radiation, thermal-structural coupling dynamic equations of a five-point suspension square solar sail are established and then the thermal-structural analyses are conducted.The characteristics and affected factors of thermally-induced vibration of the solar sail are analyzed. Numerical results show that the noticeable thermally-induced vibration happened to the five-point suspension square solar sail. The perturbation temperatures of boom cross-section and the thermally-induced vibration of the sail decreased, but the frequencies remain constant when the incident angle of heat flux increased. The increasing thickness of the boom cross-section will be beneficial to suppressing the thermally-induced vibration of the sail. The prestress of membranes of the sail could affect the thermally-induced vibration. As the axial load of the boom increases, the vibration amplified increases and the frequency decreases. The thermally-induced vibration may become unstable when the axial load of the boom increases to some extent.

Key words: solar sail, vibration, thermally-induced response, frame-membrane structure, earth orbit

CLC Number: