1 m口径主反射镜支撑系统的优化设计

孙宁

1 m口径主反射镜支撑系统的优化设计

孙宁^1,2

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

基金项目:

国家863高技术研究发展计划资助项目

详细信息

中图分类号: TH745
计量
- 文章访问数: 4373
- HTML全文浏览量: 605
- PDF下载量: 1746
- 被引次数: 0
出版历程
- 收稿日期: 2010-07-22
- 修回日期: 2010-09-24
- 刊出日期: 2010-12-20

Optimal design of support system for a 1 m diameter primary mirror

SUN Ning^1,2

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

摘要

摘要: 应用有限元法并借助有限元分析软件建立了主镜的三维实体有限元模型,对1 m主镜的支撑系统进行了优化设计。分析比较了两种常用主镜侧支撑结构,优化确定了轴向支撑半径、侧支撑方式和侧支撑点位置。分析计算显示主镜处于不同俯仰角位置时的最大面形精度RMS值为5.3 nm,满足设计指标要求,该有限元优化设计方法和过程不受主镜直径及厚度的影响,适用于平面、球面、非球面甚至异形面主镜的设计。结果表明了所设计的支撑系统方案的合理性与可行性。
- 主反射镜 /
- 支撑系统 /
- 有限元分析 /
- 轴向支撑 /
- 侧支撑
Abstract: The support system of a one-meter primary mirror was optimally designed by the finite element method. For the analysis, the 3D solid finite element model was estabilished by the finite element software. Two kinds of lateral support structures were compared, then the axial support-ring radius, lateral support form and the lateral support position were determined after the optimum design. The mirror deformations with different pitching angles were calculated, and the maximum Root-mean-square(RMS) value of the surface deformation is 5.3 nm. Obtained results satisfy the design requirement and show that the support system is reasonable and feasible. This optimal method of finite element and calculated process are independence on the diameter and thickness of the primary mirror, and are also useful for the designs of primary mirrors in the planar form, spherical form and allotype form.
- primary mirror /
- support system /
- finite element analysis /
- axial support /
- lateral support

HTML全文

参考文献(1)

[1] MALVICK A J,PEARSON E T. Theoretical elastic deformations of a 4-m diameter optical mirror using dynamic relaxation[J]. Appl. Opt.,1968,7(6):1207-1212. [2] SELKE L A. Theoretical elastic deflections of a thick horizontal circular mirror on a ring support[J]. Appl. Opt.,1970,9(1):149-153. [3] SELKE L A. Theoretical elastic deflections of a thick horizontal circular mirror on a double-ring support[J]. Appl. Opt.,1970,9(6):1453-1456. [4] NELSON J E,LUBLINER J,MAST T S. Telescope mirror supports: plate deflections on point supports[J]. SPIE,1982,332:212-228. [5] 徐加慧,夏立新,陈诚. 基于有限元法的主镜底支撑的优化[J]. 机械设计与制造 ,2004(3):67-69. XU J H,XIA L X,CHEN CH. Optimization analysis for the underside support of the primary mirror by the finite element method[J]. Machinery Design Manufacture,2004(3):67-69.(in Chinese) [6] MACK B. Deflection and stress analysis of a 4.2-m diameter primary mirror of an altazimuth-mounted telescope[J]. Appl. Opt.,1980,19(6):1000-1010. [7] 丁福建,李英才. 反射镜浮动支撑的应力与变形分析及支撑参量的优化[J]. 光子学报 ,1998,27(11):1041-1045. DING F J,LI Y C. The stress and strain analysis of main reflector with uniform pressure support and support angle optimization[J]. Acta Photonica Sinica,1998,27(11):1041-1045.(in Chinese) [8] 李福,阮萍,赵葆常. 重力作用下平面反射镜变形研究[J]. 光子学报 ,2005,34(2):272-275. LI F,RUAN P,ZHAO B CH. Study on the surface deformation of flat reflector under gravity load[J]. Acta Photonica Sinica,2005,34(2):272-275.(in Chinese) [9] 惠彬,李景镇,裴云天,等. 大口径折反射式光学系统的光机结合分析[J]. 光子学报 ,2006,35(7):1117-1120. HUI B,LI J ZH,PEI Y T,et al.. Integrated analysis of optics and mechanics in larger aperture catadioptric optical system[J]. Acta Photonica Sinica,2006,35(7):1117-1120.(in Chinese) [10] 吴小霞,杨洪波,张景旭,等. 大口径球面支撑系统的优化设计[J]. 光子学报 ,2009,38(1):129-132. WU X X,YANG H B,ZHANG J X,et al.. Optimal design of support system for the large-aperture sphere mirror[J]. Acta Photonica Sinica,2009,35(7):1117-1120.(in Chinese) [11] 郭疆,何欣. 大口径空间遥感相机主反射镜支撑设计[J]. 光学精密工程 ,2008,16(9):1642-1647. GUO J,HE X. Design of support for primary mirror of space remote sensing camera[J]. Opt. Precision Eng.,2008,16(9):1642-1647.(in Chinese) [12] 王富国,杨洪波,赵文兴,等. 1.2 m SiC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 andanalysis of a 1.2 m SiC primary mirror[J]. Opt. Precision Eng.,2009,17(1):85-91.(in Chinese) [13] WILSON R N. Reflecting Telescope Optics Ⅱ, Manufacture, Testing, Alignment, Modern Techniques[M]. Berlin:Springer,1999:242-259.

施引文献

附加信息(0)

访问统计