Thermal performance prediction of the TMT telescope structure

Details Thermal performance prediction of the TMT telescope structure Thermal performance prediction of the TMT telescope structure

Aug 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009spie.7427e..13c&link_type=abstract

Optical Modeling and Performance Predictions IV. Edited by Kahan, Mark A.. Proceedings of the SPIE, Volume 7427 (2009)., pp. 74

Computer Science

Performance

Scientific paper

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.

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