摘要
为分析航天器平面薄膜结构(包含薄膜和绳索张拉系统)的动力学特性,对真空和空气中的多花边平面薄膜结构的模态进行了有限元仿真分析,且构建了一套测试平面薄膜结构模态的试验系统,分别利用摄影测量法和扫描式激光测振仪对平面薄膜结构的平面度和模态进行了测量,试验结果验证了模态仿真分析的正确性。进一步的分析表明,平面薄膜结构的基频近似与绳索拉力的平方根呈正比,且基频随花边半径增大而减小,但减小幅度很小,说明增大绳索拉力对平面薄膜结构基频的提高比减小花边半径对基频的提高要明显得多。
In order to analyze dynamic characteristics of flat membrane structures （including mem-brane and tensioning system） , modal analysis for a flat membrane structure with multiple pockets in vacuum and air is carried out by finite element simulation and a modal testing system is built. Flatness of the flat membrane structure is measured by photogrammetric testing technique and the modal is tested by a scanning laser vibrometer. Validity of the modal simulation analysis is demonstrated by experimental results. Based on the verified modeling technique,further research results show that the fundamental frequency of flat membrane structures is approximately propor-tional to the square root of cable tension force and the fundamental frequency decreases with the in creasing of radius of pocket, but the decrease magnitude is small. Therefore, in order to in-crease the fundamental frequency of flat membrane structures, increasing cable tension force is much more efficient than decreasing radius of pocket.
作者
邱慧
李潇
樊俊峰
林秋红
檀傈锰
QIU Hui LI Xiao FAN Junfeng LIN Qiuhong TAN Limeng(Beijing Institute of Spacecraft System Engineering,Beijing 100094,China)
出处
《航天器工程》
CSCD
北大核心
2017年第3期43-49,共7页
Spacecraft Engineering
