空间望远镜主次镜支撑筒结构优化设计  

Optimization design of primary and secondary mirror supporting tube for space telescope

作　　者：卢晓明 贾建军[1,2] 周成林 谢永[1] LU Xiao-ming;JIA Jian-jun;ZHOU Cheng-lin;XIE Yong(The Shanghai Institute of Technical Physics of the Chinese Academy of Sciences,Shanghai 200083,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院上海技术物理研究所,上海200083 [2]中国科学院大学,北京100049

出　　处：《天津工业大学学报》2018年第4期84-88,共5页Journal of Tiangong University

基　　金：国家自然科学基金资助项目(61302181)

摘　　要：为研究大口径望远镜的性能与稳定性,针对主次镜支撑筒结构初始方案刚度不足、次镜镜架刚度偏低等问题,展开了详细分析,并采用无源结构拓扑优化的手段对其进行优化设计,获得了镜筒结构的主要传力路线、确定了结构设计目标.进而针对镜筒主要结构参数开展了影响因素研究,并详细设计了具体方案.结果表明:优化后质量为47.4 kg,径向变形与轴向变形分别为14.5μm与14.3μm;一阶模态为114.8 Hz.相比初始方案,质量提高了14.5%;径向与轴向变形量分别减小了34.3%和37.0%,模态提高了42.8%. 1 m口径主次镜望远镜支撑筒结构的优化设计提高了结构的整体性能..In order to study the performance and stability of large aperture telescope,a detailed analysis is carried out and the optimization design is carried out for the problems of the initial stiffness of the primary mirror supporting tube structure and the low stiffness of the secondary mirror frame.In the structural optimization,a passive structural topology optimization method is adopted,and the main transmission line of the barrel structure is obtained,and the structural design objective is determined.In addition,the influence factors of the main structural parameters of the mirror barrel are studied,and the specific scheme is designed in detail.The optimized weight is 47.4 kg,the radial deformation and axial deformation are 14.5μm and 14.3μm respectively,and the first order mode is 114.8 Hz.Compared with the original scheme,the weight is increased by 14.5%,the radial and axial deformations are reduced by 34.3%and 37.0%respectively,and the modal is increased by 42.8%.The optimization design of the supporting tube structure of the 1 m primary and secondary telescope has improved the overall performance of the structure.

关 键 词：大口径 优化设计 支撑结构 拓扑优化 

分 类 号：TH751[机械工程—仪器科学与技术]