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Coupled Thermoelastic Response and Its Stability of Flexible Solar Array Subjected to Radiation Heating

辐射加热下柔性太阳能电池阵的耦合热弹性响应及其稳定性

基本信息

批准号：
09651009
负责人：
MUROZONO Masahiko
金额：
$ 1.73万
依托单位：
KYUSHU UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1997
资助国家：
日本
起止时间：
1997 至 1998
项目状态：
已结题

项目摘要

Theoretical analyses of the buckling characteristics, the natural vibration characteristics, the quasistatic thermal-structural responses, and the dynamic thermal-structural responses of an asymmetric flexible rolled-up solar array were presented. The analyses were based on a generalized flexible rolled-up solar array model assuming asymmetric loading conditions because of geometric asymmetry. Numerical calculations were conducted using the data for the solar arrays of the Hubble Space Telescope. The buckling analysis established the possible critical buckling forces and buckling modes and showed that, for the HST solar array, buckling will occur in torsion. The lowest buckling force was slightly larger than the typical design value of the solar array.Calculated results also suggests that the torsional buckling force rose and the bending buckling force fell because of the bending-torsion coupling effects. The vibration analysis made clear that the natural frequencies and the mode shape … More s depended considerably on the average compressive axial force of the BiSTEMs. Calculated results if the axial force took the design value for the solar array showed that the first mode was dominated by the torsional deformation of the whole solar array, the second mode was bending, and the higher modes were dominated by the solar blanket deflection, though all vibration modes were influenced by bending-torsional coupling. Quasistatic structural responses of the solar array subjected to sudden radiation heating such as typical night-day transition in orbit were calculated. The results showed that the structural response depends significantly on the compressive axial force. When the axial force was close to the buckling force, large bending moments occurred at the midpoint of the outer BiSTEM.The result suggests that thermally induced quasistatic torsional deformation may have caused the failure of the solar array BiSTEM.Time histories of the deflections and bending moments of the HST solar array were calculated analytically using modal analysis. Less

对非对称柔性太阳电池阵的屈曲特性、固有振动特性、准静态热结构响应和动态热结构响应进行了理论分析。分析的基础上，一个广义的灵活卷起太阳能电池阵列模型假设不对称的负载条件，因为几何不对称。利用哈勃空间望远镜太阳能电池阵列的数据进行了数值计算。屈曲分析建立了可能的临界屈曲力和屈曲模式，并表明，对于HST太阳能电池阵，屈曲将发生在扭转。最低屈曲力略大于太阳能电池阵的典型设计值，计算结果还表明，由于弯扭耦合效应，扭转屈曲力上升，弯曲屈曲力下降。振动分析表明，固有频率和振型 ...更多信息 s在很大程度上取决于BiSTEM的平均压缩轴向力。计算结果表明，在轴向力取设计值的情况下，太阳帆板的第一阶模态主要由整体扭转变形控制，第二阶模态主要由弯曲变形控制，高阶模态主要由太阳包层挠度控制，但各阶模态均受弯扭耦合影响。计算了太阳电池阵在轨道上典型昼夜转换等突发辐射加热作用下的准静态结构响应。结果表明，结构的响应显著依赖于压缩轴力。当轴向力接近屈曲力时，外部BiSTEM中点处产生较大的弯矩，表明热致准静态扭转变形可能是导致太阳能电池阵BiSTEM失效的原因。少