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Design and Coupled Thermo-Mechanical Analysis of Silicon Carbide Primary Mirror Assembly
作者姓名:HAN  Yuan-yuan  ZHANG  Yu-min  HAN  Jie-cai
作者单位:Center for Composite Materials, Harbin Institute of Technology, Harbin 150080, China
摘    要:

关 键 词:碳化硅  主镜组件  设计  热力-力学耦合分析  空间光学仪器
收稿时间:2006-08-10
修稿时间:2006-11-06

Design and Coupled Thermo-Mechanical Analysis of Silicon Carbide Primary Mirror Assembly
HAN Yuan-yuan ZHANG Yu-min HAN Jie-cai.Design and Coupled Thermo-Mechanical Analysis of Silicon Carbide Primary Mirror Assembly[J].Chinese Journal of Aeronautics,2006,19(B12):62-65.
Abstract:Based on the principle that the thermal expansion coefficient of the support structure should match that of the mirror, three schemes of primary mirror assembly were designed. Of them, the first is fused silica mirror plus 4J32 flexible support plus ZTC4 support back plate, the second K9 mirror plus 4J45 flexible support plus ZTC4 support back plate, and the third SiC mirror plus SiC rigid support back plate. A coupled thermo-mechanical analysis of the three primary mirror assemblies was made with finite element method. The results show that the SiC assembly is the best of all schemes in terms of their combination properties due to its elimination of the thermal expansion mismatch between the materials. The analytical results on the cryogenic property of the SiC primary mirror assembly show a higher surface finish of the SiC mirror even under the cryogenic condition.
Keywords:silicon carbide  primary mirror assembly  design  coupled thermo-mechanical analysis
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