Thermal performance prediction of the TMT telescope structure

Myung Cho; Andrew Corredor; Konstantinos Vogiatzis; George Angeli

doi:10.1117/12.828057

1 October 2009 Thermal performance prediction of the TMT telescope structure

Myung Cho, Andrew Corredor, Konstantinos Vogiatzis, George Angeli

Proceedings Volume 7427, Optical Modeling and Performance Predictions IV; 74270E (2009) https://doi.org/10.1117/12.828057
Event: SPIE Optical Engineering + Applications, 2009, San Diego, California, United States

Abstract

Thermal analysis for the Thirty Meter Telescope (TMT) structure was performed using finite element analysis in ANSYS and I-DEAS. In the thermal analysis, the telescope structural parts with simplified optical assembly systems were modeled for various thermal conditions including air convections, conductions, heat flux loadings, and radiations. Thermal responses of the TMT telescope structure were predicted and the temperature distributions of the optical assembly systems were calculated under sample thermal loading conditions. The thermo-elastic analysis was made to obtain the thermal deformation based on the resulting temperature distributions. The line of sight calculation was made using the thermally induced structural deformations. The goal of this thermal analysis is to establish thermal models by the FEA programs to simulate for an adequate thermal environment. These thermal models can be utilized for estimating the thermal responses of the TMT structure. Thermal performance prediction of the TMT structure will be able to guide us to control and maintain the system from the "seeing" effects.

Citation Download Citation

Myung Cho, Andrew Corredor, Konstantinos Vogiatzis, and George Angeli "Thermal performance prediction of the TMT telescope structure", Proc. SPIE 7427, Optical Modeling and Performance Predictions IV, 74270E (1 October 2009); https://doi.org/10.1117/12.828057

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