Structural analysis of ground-based large telescopes

ZHOU Chao; YANG Hong-bo; WU Xiao-xia; ZHANG Jing-xu

doi:10.3788/OPE.20111901.0138

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Structural analysis of ground-based large telescopes

Article | 更新时间：2020-08-12

- Structural analysis of ground-based large telescopes
- Optics and Precision Engineering Vol. 19, Issue 1, Pages: 138-145(2011)
- 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：
- DOI：10.3788/OPE.20111901.0138
  CLC： TH751
- Received：06 April 2010，
  
  Revised：10 May 2010，
  
  Published Online：22 January 2011，
  
  Published：22 January 2011
- 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

HOWELL D J,UEBELHART S A, MILLER D W. Lessons learned from parametric structural modeling of a large ground based observatory [J]. SPIE, 2006,6271:1-10.[2] CHO M K,WARNER M,LEE J P. Structural analysis for the 4-m advanced technology solar telescope (ATST) [J]. SPIE, 2005, 5877:1-11.[3] LTOH N,MIKAMI I,NOGUCHI T, et al.. Mechanical structure of JNLT-analysis of mirror deflection due to wind loading [J]. SPIE, 1990,1236:866-877.[4] NEILL D R,SEBAG J,WARNER M, et al.. Wind induced image degradation (Jitter) of the LSST Telescope [J]. SPIE, 2008,7012:1-11.[5] CHO M K,STEPP L,KIM S. Wind buffeting effects on the Gemini 8m primary mirrors [J]. SPIE, 2001, 4444:302-314.[6] KOCH F. Analysis concepts for large telescope structures under earthquake Load [J]. SPIE, 1997, 2871:117-126.[7] PERROTTA F. Earthquake safety system design for a telescope primary mirror [J]. SPIE, 2008,7017:1-12.[8] 杜俊峰,张林波,任戈. 1.3 m主镜的支撑设计[J]. 光学精密工程,2007,15(10):1483-1488. DU J F,ZHANG L B,REN G.Mounting system design for 1.3m primary mirror [J].Opt.Precision Eng.,2007,15(10):1483-1488.(in Chinese)[9] 王富国,杨洪波,赵文兴,等. 1.2 mSiC主镜轻量化设计与分析[J]. 光学精密工程, 2009,17(1):85-91. WANG F G,YANG H B,ZHAO W X,et al..Lightweight design and analysis of a 1.2m SiC primary mirror[J].Opt. Precision Eng.,2009,17(1):85-91.(in Chinese)[10] 谭凡教,乔彦峰,李耀彬,等. 经纬仪主镜轻量化新方法[J]. 光学精密工程,2008,16(1):22-28. TAN F J,QIAO Y F,LI Y B,et al..New technology for lightweight large primary mirror of theodolite [J].Opt.Precision Eng.,2008,16(1):22-28.(in Chinese)[11] 王俊,卢锷,王家骐. 径向滚珠轴承在工程分析中简化方法的研究[J]. 光学精密工程,1999,7(2):110-115. WANG J,LU E,WANG J Q.A study on the simplifying method of ball bearing in structural analysis[J].Opt.Precision Eng.,1999,7(2):110-115.(in Chinese)[12] 杨德华,顾伯忠,崔向群. 一种双列调心球面球轴承刚度的计算及应用[J]. 机械科学与技术,2003,22(增):114-117. YANG D H,GU B ZH,CUI X Q.Stiffness calculation and application of self-aligning ball bearing [J]. Mechanical Science and Technology,2003,22(Supp.):114-117. (in Chinese)[13] MICHELS G J,GENBERG V L, DOYLE K B. Finite element modeling of nearly incompressible bonds [J]. SPIE, 2002,4771:287-295.[14] HATHEWAY A E. Analysis of adhesive bonds in optics[J]. SPIE,1993,1998:2-7.[15] 程景全.天文望远镜原理和设计[M]. 北京:中国科学技术出版社,2003. CHENG J Q. Principle and Design of Astronomical Telescope[M].Beijing: China Science & Technology Press, 2003.(in Chinese)[16] YANG D H,GU B ZH,CUI X Q.Structure analysis of the reflecting surface system of a large astronomical telescope [J].Chinese Journal of Mechanical Engineering,2004,17(3):415-419.

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