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17 May 2019 Optimization design of space mirror support based on topology optimization method
Wen Jing Xu, Wei Wang, Yan Jun Qu, Bei Liu, Xu Peng Li, Xiao Zhe Ma
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Proceedings Volume 11170, 14th National Conference on Laser Technology and Optoelectronics (LTO 2019); 1117013 (2019) https://doi.org/10.1117/12.2532694
Event: Fourteenth National Conference on Laser Technology and Optoelectronics, 2019, Shanghai, China
Abstract
An optimal design method for lateral support structure of space telescope based on topology optimization theory and substructure method is presented in this paper. Introduced how to simplify the finite element model by substructure method in the process of analysis. Topology optimization is performed on the reduced model. Based on the variable density method (SIMP method), a mathematical model of continuum structure topology optimization is created to achieve efficient use of materials. Design a new type of mirror support structure. Consider the shape of the mirror which under axial gravity, radial gravity and temperature load conditions. The fundamental frequency of the mirror and the displacement of the rigid body are constrained, and the manufacturability of the topological results are also considered. The static and modal analysis of the structure using finite element method shows that the basic frequency and the shape precision of the mirror can meet the design requirements (the fundamental frequency f >120Hz, the surface accuracy is better than λ/60 RMS, λ/10 PV). This shows the feasibility of the method proposed in this paper in the design.
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Wen Jing Xu, Wei Wang, Yan Jun Qu, Bei Liu, Xu Peng Li, and Xiao Zhe Ma "Optimization design of space mirror support based on topology optimization method", Proc. SPIE 11170, 14th National Conference on Laser Technology and Optoelectronics (LTO 2019), 1117013 (17 May 2019); https://doi.org/10.1117/12.2532694
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KEYWORDS
Mirrors
Optimization (mathematics)
Finite element methods
Mirror structures
Telescopes
Space mirrors
Space telescopes
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