Lightweight structure design for supporting plate of primary mirror

Xiao Wang; Wei Wang; Bei Liu; Yan Jun Qu; Xu Peng Li

doi:10.1117/12.2285730

24 October 2017 Lightweight structure design for supporting plate of primary mirror

Xiao Wang, Wei Wang, Bei Liu, Yan Jun Qu, Xu Peng Li

Proceedings Volume 10463, AOPC 2017: Space Optics and Earth Imaging and Space Navigation; 104631O (2017) https://doi.org/10.1117/12.2285730
Event: Applied Optics and Photonics China (AOPC2017), 2017, Beijing, China

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.

Citation Download Citation

Xiao Wang, Wei Wang, Bei Liu, Yan Jun Qu, and Xu Peng Li "Lightweight structure design for supporting plate of primary mirror", Proc. SPIE 10463, AOPC 2017: Space Optics and Earth Imaging and Space Navigation, 104631O (24 October 2017); https://doi.org/10.1117/12.2285730

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