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马民,谭毅. 大口径主镜镜面朝下镀膜支撑优化设计[J]. 科学技术与工程, 2020, 20(23): 9367-9377.
MaMin.Optimum design of downward coating support for large aperture primary mirror[J].Science Technology and Engineering,2020,20(23):9367-9377.
大口径主镜镜面朝下镀膜支撑优化设计
Optimum design of downward coating support for large aperture primary mirror
投稿时间:2019-09-02  修订日期:2020-05-04
DOI:
中文关键词:  2mSiC主镜  参数化建模  镀膜支撑  Bipod支撑
英文关键词:2m-SiC-Mirror  Parametric modeling  Support of coating  Bipod
基金项目:
     
作者单位
马民 中国科学院光电技术研究所
谭毅 中国科学院光电技术研究所
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中文摘要:
      本文通过采用参数化建模方法联合有限元软件仿真分析优化和数学计算软件。针对2m级SiC主镜进行轻量化设计与优化,并设计出了一套以机械whiffletree作为轴向支撑,切向杆A-Frame为侧支撑的镜面朝下的镀膜支撑方案。保证了主镜翻转为镜面朝下的过程中,面形精度RMS的最大值为16.474nm,镜面朝下时RMS值为14.334nm,PV值为61.49nm。并通过特殊的结构设计在确保镀膜质量和主镜翻转过程中的安全性的前提下,使主镜在90℃高温下最大应力仅为3.7201Mpa(属于弹性变形范围),实现了轴向支撑与侧支撑的自由度解耦,保证主镜的自由热膨胀,满足镀膜要求。
英文摘要:
      This article adopted parametric modeling method,Finite element simulation analysis and use Mathematical computing software to optimizations and design for a 2m SiC primary mirror.Designed a downward coating support for large aperture primary mirror which radial supports based on Whiffletree structure and axial supports based on A-Frame structure.It ensured the safety in the process of turning over the primary mirror.In this process the max surface RMS of the primary mirror was only 16.474 nm.And when the surface of the mirror was downward its’ RMS was 14.334 nm,PV was 61.49 nm. Through special structure design ensured the coating quality of primary mirror and the safety of the overturning process.And when the temperature of the primary mirror reaches 90℃,the maximum stress of primary mirror was only 3.7201 Mpa(it belongs to elastic deformation).The degree of freedom decoupling of axial support and radial support was realized.Ensured the Free thermal expansion of primary mirror and the coating-supports’ safety and quality.
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