大型空间结构热致动态响应研究综述

Review of Thermally-Induced Dynamic Responsesof Large Space Structures

大型柔性空间结构在轨运行进出地球阴影区时,受突变热流的影响,结构内部会产生时变温度梯度,从而产生不均匀的热应变以及热应力,引发结构的热致结构响应,最终影响航天器的正常工作。本文首先对空间轨道热载荷进行了简要分析,随后以Boley系数为牵引与基础,综述了当今国内外热致动态响应以及热颤振准则的研究进展,最后对热致动态响应的未来研究趋势进行了展望。

During the orbital moving in or out of the earth's shadow region,under the suddenly changed thermal loading,time-dependent temperature gradients are generated in the large flexible space structure.This causes non-uniform thermal strain and thermal stress,triggering the thermally induced structural responses,which would probably affect normal operations of the spacecraft.The thermal environment of space orbit is analysed in this paper at first.Then,based on Boley coefficient,some progresses in thermally induced dynamic responses and thermal flutter criterions at home and abroad are reviewed.At last,the future research trends of thermally induced dynamic responses are prospected.