Design and finite element analysis of Φ510 mm SiC ultra-lightweight mirror

ZHANG Yuan-yuan; JING Wei; CHENG Yun-tao; HU Gui-tao; FANG Jing-zhong

doi:10.3788/OPE.20122008.1718

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Design and finite element analysis of Φ510 mm SiC ultra-lightweight mirror

更新时间：2020-08-12

- Design and finite element analysis of Φ510 mm SiC ultra-lightweight mirror
- Optics and Precision Engineering Vol. 20, Issue 8, Pages: 1718-1724(2012)
- 作者机构：
  
  中国科学院光电技术研究所, 四川成都 610209
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20122008.1718
  CLC： TH703
- Received：16 February 2012，
  
  Revised：23 March 2012，
  
  Published：10 August 2012
- 稿件说明：
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张媛媛, 敬畏, 程云涛, 胡桂涛, 方敬忠. Φ510 mm SiC超轻量化反射镜的设计与有限元分析[J]. 光学精密工程, 2012,(8): 1718-1724

ZHANG Yuan-yuan, JING Wei, CHENG Yun-tao, HU Gui-tao, FANG Jing-zhong. Design and finite element analysis of Φ510 mm SiC ultra-lightweight mirror[J]. Editorial Office of Optics and Precision Engineering, 2012,(8): 1718-1724
张媛媛, 敬畏, 程云涛, 胡桂涛, 方敬忠. Φ510 mm SiC超轻量化反射镜的设计与有限元分析[J]. 光学精密工程, 2012,(8): 1718-1724 DOI： 10.3788/OPE.20122008.1718.

ZHANG Yuan-yuan, JING Wei, CHENG Yun-tao, HU Gui-tao, FANG Jing-zhong. Design and finite element analysis of Φ510 mm SiC ultra-lightweight mirror[J]. Editorial Office of Optics and Precision Engineering, 2012,(8): 1718-1724 DOI： 10.3788/OPE.20122008.1718.

摘要

针对

510 mmSiC超轻量化反射镜的研制

提出了一剖面为船型、内部为正三角形、面板加密呈正六边形的轻量化结构。当设计重量为1.85 kg时

通过调整各个结构参数与另外两种相同重量的轻量化结构进行了比较。结果表明

在同样背部6点支撑作用下

该超轻量化结构在光轴指向天顶时由自重引起的面形(RMS)具有较大优势。利用Patran\Nastran有限元软件模拟计算了该超轻量化反射镜在光轴水平状态下的自重镜面变形

并对其进行了热力学及动力学特性分析。分析结果显示

该超轻量化反射镜各项指标均能满足使用要求。最终

根据设计结果试制加工了一块镜坯

初步加工后的重量约为2.2 kg

面密度约为10.8 kg/m

已达到目前SiC超轻量化反射镜的先进水平。

Abstract

To develop a

510 mm SiC ultra-lightweight mirror

this paper proposes an ultra-lightweight structure with a section in ship form

an internal structure in regular-triangle

and a face plate reinforced with regular-hexagon. When the design weight is 1.85 kg

the structure performance is compared with those of other two lightweight structures with the same weight by adjusting all structure parameters. It is shown that in the same 6 point supportings on mirror backs

this ultra-lightweight structure owns absolute advantages in the gravitational deformation of mirror surface (RMS) as comparing with other two structures when the optical axis is pointed to the zenith. Furthermore

Patran\Nastran finite element software is used to simulate and calculate the gravitational deformation of the mirror surface when the axis is pointed to the horizon

and its thermodynamic and dynamical characteristics are analyzed. The results present that all performance indexes of this ultra-lightweight mirror meet requirements of applications. Finally

according to the design

a mirror blank with a weight about 2.2 kg and surface density about 10.8 kg/m

is fabricated. With excellent performance

it has been up to the today's advanced level in the SiC ultra-lightweight mirror field.

关键词

Keywords

references

杨秉新. 空间相机用碳化硅(SiC)反射镜的研究[J]. 航天返回与遥感, 2003, 24(1):15-18. YANG B X. Research of SiC reflection mirror for space camera[J]. Spacecraft Recovery & Remote Sensing, 2003,24(1):15-18. (in Chinese)

HADAWAY J B, ENG R,STAHL H P, et al.. Cryogenic performance of lightweight SiC and C/SiC mirrors[J]. SPIE,2004,5487:1018-1029.

EALEY M A,WELLMAN J A. Highly adaptive integrated meniscus primary mirrors[J]. SPIE,2004,5166:165-171.

唐裕霞, 张舸. 大口径碳化硅轻质反射镜镜坯制造技术的研究进展[J]. 光学技术,2007,22(4):510-518. TANG Y X, ZHANG G. The development of fabrication techniques in large scale light-weighted SiC mirror blank[J]. Optical Technique, 2007,22(4):510-518. (in Chinese)

张舸,赵文兴. 轻型反射镜镜体结构参数的分析[J]. 光学精密工程,2006,1:48-53. ZHANG G, ZHAO W X. Analysis on structural parameters of light-weighted mirror[J]. Opt. Precision Eng., 2006,1:48-53. (in Chinese)

张剑寒,张宇民,韩杰才,等. 空间用碳化硅反射镜的设计制造与测试[J]. 光学精密工程,2006,2:179-184. ZHANG J H, ZHANG Y M, HAN J C, et al.. Design, fabrication and testing of space-borne SiC mirror[J]. Opt. Precision Eng., 2006,2:179-184. (in Chinese)

ERICKSON E F,HONAKER M A,BRIVKALNS C A, et al.. Backup secondary mirror and mechanism for SOFIA[J]. SPIE,2004,5489:1012.

SUANUMA M,IMAI T, KATAYAMA H, et al.. Optical testing of lightweight large all-C/SIC opticas . International Conference on Space Optics, 2010.

HIDEHIRO K,TAKAO N,TAKASHI O, et al.. Development of lightweight SiC mirrors for the space infrared telescope for cosmology and astrophysics (SPICA) mission[J]. SPIE,2007,6666:6666071-9.

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