光学精密工程2012，Vol.20Issue(8)：1718-1724,7.DOI:10.3788/OPE.20122008.1718
Φ510 mmSiC超轻量化反射镜的设计与有限元分析
Design and finite element analysis of Φ510 mm SiC ultra-lightweight mirror
摘要
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/m2 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
超轻量化反射镜/碳化硅反射镜/反应烧结/Patran\NastranKey words
ultra-lightweight mirror/ SiC mirror/ reaction bonding/ Patran\Nastran分类
机械制造引用本文复制引用
张媛媛,敬畏,程云涛,胡桂涛,方敬忠..Φ510 mmSiC超轻量化反射镜的设计与有限元分析[J].光学精密工程,2012,20(8):1718-1724,7.基金项目
中国科学院光电技术研究所前沿部署项目(No.C09K007) （No.C09K007）
