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Optimum design of lightweight silicon carbide mirror

HAN Yuan-yuan,ZHANG Yu-min,HAN Jie-cai,ZHANG Jian-han,YAO Wang,ZHOU Yu-feng (Center for Composite Materials, Harbin Institute of Technology, Harbin 150080, China )  
According to the design requirements of a certain silicon carbide mirror, the static and dynamic properties of silicon carbide (SiC) mirror with the sector, the triangle and the hexagon structure were analyzed. Mirrors with the triangle structural form which has the best combination property was chosen to do the optimum analysis. A parameter structure model had been established using the finite element analysis. Some structure parameters having significant effect on the mechanical properties and the mass of the mirror, such as thickness of the mirror, the faceplate and the rib, were used as the design variables. The zero-order optimization method was used to do the optimal design. An ultra-lightweight, high precision mirror is gained finally.
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