Topology optimization design of cradle of GSSMP

Haibo Jiang; Hongchao Zhao; Fei Yang

doi:10.1117/12.2506583

11 January 2019 Topology optimization design of cradle of GSSMP

Haibo Jiang, Hongchao Zhao, Fei Yang

Proceedings Volume 10837, 9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes; 108370M (2019) https://doi.org/10.1117/12.2506583
Event: Ninth International Symposium on Advanced Optical Manufacturing and Testing Technologies (AOMATT2018), 2018, Chengdu, China

Abstract

Tertiary mirror of thirty meter telescope (TMT) has the tracking and pointing capabilities, and its structure is similar to an alt-az telescope. The cradle serves a similar function to the center block of the track frame, its structure directly affects the performance of the system. M3 prototype as an example, in order to improve stiffness to weight ratio of the cradle, the mathematical model of topology optimization design of the cradle was established and the optimization was performed. Then a spliced truss structure for cradle was designed based on the result of the topology optimization. By using finite element method, the static and dynamic analysis of cradle under different conditions was done according to the working characteristics. The results showed that under the conditions of the gravity vertical along the x, y, z, the maximum deformation of cradle was 0.064mm, 0.015mm, 0.025mm respectively, and the first modal frequency is 74.4Hz. Results showed the structure designed meets the requirement.

Citation Download Citation

Haibo Jiang, Hongchao Zhao, and Fei Yang "Topology optimization design of cradle of GSSMP", Proc. SPIE 10837, 9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes, 108370M (11 January 2019); https://doi.org/10.1117/12.2506583

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KEYWORDS

Mirrors

Optimization (mathematics)

Structural design

Telescopes

Modal analysis

Prototyping

Finite element methods

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