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TMT Telescope Structure thermal model

机译：TMT望远镜结构热模型

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The thermal behavior of the Thirty Meter Telescope (TMT) Telescope Structure (STR) and the STR mounted subsystems depends on the heat load of the System, the thermal properties of component materials and the environment as well as their interactions through convection, conduction and radiation. In this paper the thermal environment is described and the latest three-dimensional Computational Solid Dynamics (CSD) model is presented. The model tracks the diurnal temperature variation of the STR and the corresponding deformations. The resulting displacements are fed into the TMT Merit Function Routine (MFR), which converts them into translations and rotations of the optical surfaces. They, in turn, are multiplied by the TMT optical sensitivity matrix that delivers the corresponding pointing error. Thus the thermal performance of the structure can be assessed for requirement compliance and design guidance can be provided. In addition, thermal drift correction strategies and look-up tables can be developed. Results of CFD simulations for a representative diurnal cycle based on measured temperature data from the TMT site on Mauna Kea are presented and conclusions are drawn.
机译：三十米望远镜（TMT）望远镜结构（STR）和STR安装的子系统的热性能取决于系统的热负荷，组件材料和环境的热特性以及它们通过对流，传导和辐射的相互作用。本文描述了热环境，并提出了最新的三维计算固体动力学（CSD）模型。该模型跟踪STR的昼夜温度变化和相应的变形。产生的位移被输入到TMT优点函数例程（MFR）中，该例程将它们转换为光学表面的平移和旋转。反过来，它们乘以提供相应指向误差的TMT光学灵敏度矩阵。因此，可以评估结构的热性能是否符合要求，并可以提供设计指导。此外，可以开发热漂移校正策略和查找表。提出了基于来自莫纳克亚山（Mauna Kea）TMT站点的测得温度数据的代表性昼夜周期CFD模拟结果，并得出了结论。

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