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Proceedings Paper

Lightweight structure design for supporting plate of primary mirror
Author(s): Xiao Wang; Wei Wang; Bei Liu; Yan Jun Qu; Xu Peng Li
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Paper Abstract

A topological optimization design for the lightweight technology of supporting plate of the primary mirror is presented in this paper. The supporting plate of the primary mirror is topologically optimized under the condition of determined shape, loads and environment. And the optimal structure is obtained. The diameter of the primary mirror in this paper is 450mm, and the material is SiC1 . It is better to select SiC/Al as the supporting material. Six points of axial relative displacement can be used as constraints in optimization2 . Establishing the supporting plate model and setting up the model parameters. After analyzing the force of the main mirror on the supporting plate, the model is applied with force and constraints. Modal analysis and static analysis of supporting plates are calculated. The continuum structure topological optimization mathematical model is created with the variable-density method. The maximum deformation of the surface of supporting plate under the gravity of the mirror and the first model frequency are assigned to response variable, and the entire volume of supporting structure is converted to object function. The structures before and after optimization are analyzed using the finite element method. Results show that the optimized fundamental frequency increases 29.85Hz and has a less displacement compared with the traditional structure.

Paper Details

Date Published: 24 October 2017
PDF: 9 pages
Proc. SPIE 10463, AOPC 2017: Space Optics and Earth Imaging and Space Navigation, 104631O (24 October 2017); doi: 10.1117/12.2285730
Show Author Affiliations
Xiao Wang, Xi'an Institute of Optics and Precision Mechanics (China)
Univ. of Chinese Academy of Science (China)
Wei Wang, Xi'an Institute of Optics and Precision Mechanics (China)
Bei Liu, Xi'an Institute of Optics and Precision Mechanics (China)
Univ. of Chinese Academy of Science (China)
Yan Jun Qu, Xi'an Institute of Optics and Precision Mechanics (China)
Univ. of Chinese Academy of Science (China)
Xu Peng Li, Xi'an Institute of Optics and Precision Mechanics (China)
Univ. of Chinese Academy of Science (China)


Published in SPIE Proceedings Vol. 10463:
AOPC 2017: Space Optics and Earth Imaging and Space Navigation
Carl Nardell; Suijian Xue; Huaidong Yang, Editor(s)

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