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地基大口径望远镜结构的性能分析
引用本文:周超,杨洪波,吴小霞,张景旭.地基大口径望远镜结构的性能分析[J].光学精密工程,2011,19(1):138-145.
作者姓名:周超  杨洪波  吴小霞  张景旭
作者单位:1. 中国科学院,长春光学精密机械与物理研究所,吉林,长春,130033;中国科学院,研究生院,北京,100039
2. 中国科学院,长春光学精密机械与物理研究所,吉林,长春,130033
基金项目:中国科学院长春光学精密机械与物理研究所三期创新重大研究项目专项资金资助
摘    要:为了研究和优化地基大口径望远镜系统的整体性能,对其整系统进行了有限元建模和分析.针对1.23 m口径的光电望远镜,研究了望远镜各部件的结构特点及连接关系,论述了相关部件的简化方法,建立了整系统的有限元模型.计算了当望远镜指向天顶和水平状态时系统的重力变形情况,给出主次镜的变形结果.分析了望远镜在风载和地震波载荷作用下的...

关 键 词:大口径望远镜  有限元分析  风载  地震波
收稿时间:2010-04-06
修稿时间:2010-05-10

Structural analysis of ground-based large telescopes
ZHOU Chao,YANG Hong-bo,WU Xiao-xia,ZHANG Jing-xu.Structural analysis of ground-based large telescopes[J].Optics and Precision Engineering,2011,19(1):138-145.
Authors:ZHOU Chao  YANG Hong-bo  WU Xiao-xia  ZHANG Jing-xu
Affiliation:1. Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China;; 2. Graduate University of Chinese Academy of Sciences, Beijing 100039, China
Abstract:To research the performance of ground-based large telescopes and to optimize the design and structures of telescopes,the finite element analysis for the whole assembly was performed. For a 1.23 m telescope,the structural characteristics of main parts and their relation were studied,several kinds of simplification methods for some parts were discussed and a precise finite element model of the whole telescope assembly was established. Moreover,the gravity deformations of the telescope in both zenith and horizon pointing states were calculated and the deformation results of the primary mirror and the secondary mirror were given. Finally,the telescope assembly dynamic responses due to the wind loading and seismic excitation were analyzed. The obtained results show that wind loading will induce the optical axis misalignment of the primary mirror and secondary mirror, and the misalignment error RMS value is allowable in 0.025″. The displacements along three orthogonal directions induced by seismic excitation are greater, but the maximum stress is only 16.67 MPa, which cannot bring the damage to telescope structures.
Keywords:large telescope  finite element analysis  wind loading  seismic excitation
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