地基大口径望远镜结构的性能分析

周超; 杨洪波; 吴小霞; 张景旭

doi:10.3788/OPE.20111901.0138

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地基大口径望远镜结构的性能分析

微纳技术与精密机械 | 更新时间：2020-08-12

- 地基大口径望远镜结构的性能分析
- Structural analysis of ground-based large telescopes
- 光学精密工程 2011年19卷第1期页码：138-145
- 作者机构：
  
  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
  2. 中国科学院研究生院,北京 100039
- 作者简介：
- 基金信息：
  
  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()
- DOI：10.3788/OPE.20111901.0138
  中图分类号： TH751
- 收稿日期：2010-04-06，
  
  修回日期：2010-05-10，
  
  网络出版日期：2011-01-22，
  
  纸质出版日期：2011-01-22
- 稿件说明：
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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, 2010,19(1): 138-145

ZHOU Chao, YANG Hong-bo, WU Xiao-xia, ZHANG Jing-xu. Structural analysis of ground-based large telescopes[J]. Editorial Office of Optics and Precision Engineering, 2010,19(1): 138-145
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, 2010,19(1): 138-145 DOI： 10.3788/OPE.20111901.0138.

ZHOU Chao, YANG Hong-bo, WU Xiao-xia, ZHANG Jing-xu. Structural analysis of ground-based large telescopes[J]. Editorial Office of Optics and Precision Engineering, 2010,19(1): 138-145 DOI： 10.3788/OPE.20111901.0138.

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动态响应情况并给出了响应结果。分析表明:风载作用将引起望远镜主次镜光轴偏心

其偏心误差RMS值为0.025

满足系统设计要求;地震波引起主次镜在3个方向上的位移较大

但最大应力为16.67 MPa

不会破坏望远镜系统的结构。

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.

关键词

Keywords

references

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