Abstract
During the orbital eclipse transition, flexible appendages of large-scale space structures may experience thermally induced vibrations. To control these adverse responses, a novel optimal design scheme is proposed in this article, which tries to minimize an index determined by the system characteristic thermal time and natural frequency. Because this index is a system property independent of time, the computational cost is greatly reduced compared to the cost of optimizing transient processes. In addition, a kind of Fourier-FEM technique and the Lanczos method are adopted to calculate the system characteristic thermal time efficiently. The advantage of this optimization scheme is demonstrated by several numerical examples.
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