航空学报 > 2019, Vol. 40 Issue (11): 223135-223135   doi: 10.7527/S1000-6893.2019.23135

太阳帆航天器在绕地轨道中的热诱发振动

张军徽1, 佟安1, 武娜1, 刘应华2   

  1. 1. 北方工业大学 土木工程学院, 北京 100144;
    2. 清华大学 航天航空学院, 北京 100084
  • 收稿日期:2019-05-07 修回日期:2019-05-24 出版日期:2019-12-03 发布日期:2019-06-24
  • 通讯作者: 张军徽 E-mail:jasonstina@gmail.com
  • 基金资助:
    国家自然科学基金(11572001)

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)

摘要: 太阳帆航天器在绕地轨道中将会周期性地进出地球阴影,经历热环境的剧烈变化,在热辐射冲击作用下,太阳帆这种大柔性空间结构的热致响应值得研究。以方形有桅杆式太阳帆为研究对象,考虑热辐射等非线性因素,建立了太阳帆的热-结构耦合动力学模型,分析了太阳帆桅杆-薄膜结构热诱发振动的特点和影响因素。分析结果表明:太阳帆由地球阴影区进入光照区将会发生明显的热诱发振动;随着热流入射角的增大,太阳帆桅杆截面的摄动温度减小,热诱发振动减弱,频率不变;太阳帆桅杆刚度的增大有利于抑制结构热诱发振动的发生;帆膜预应力将会影响太阳帆的热诱发振动,随着桅杆轴力增大,热诱发振动的振幅增大,频率减小,当轴力增大至一定程度,太阳帆的热诱发振动将会发散。

关键词: 太阳帆, 振动, 热致响应, 框架-薄膜结构, 绕地轨道

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

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