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首页> 外文期刊>Journal of thermal stresses >SUPPRESSING THE THERMALLY INDUCED VIBRATION OF LARGE-SCALE SPACE STRUCTURES VIA STRUCTURAL OPTIMIZATION
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SUPPRESSING THE THERMALLY INDUCED VIBRATION OF LARGE-SCALE SPACE STRUCTURES VIA STRUCTURAL OPTIMIZATION

机译：通过结构优化抑制大型空间结构的热感应振动

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摘要

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.
机译：在轨道月食过渡期间，大型空间结构的柔性附件可能会经历热诱发的振动。为了控制这些不利响应，本文提出了一种新颖的最佳设计方案，该方案试图最小化由系统特征热时间和固有频率确定的指标。因为此索引是与时间无关的系统属性，所以与优化瞬态过程的成本相比，计算成本大大降低。另外，采用了一种傅立叶有限元技术和Lanczos方法来有效地计算系统特征热时间。该优化方案的优势通过几个数值示例得到了证明。

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