强激光与粒子束2017，Vol.29Issue(6)：5-11,7.DOI:10.11884/HPLPB201729.160555
大口径轻量化主镜的温度场等效模型理论计算
Equivalent analytical calculation of the temperature field of the lightweighted primary mirror for large-aperture telescope
摘要
Abstract
The thermal loads of ambient temperature and solar radiation around the telescope directly influence the temperature distribution within the primary mirror for a large-aperture telescope.Based on the unsteady heat conduction and boundary condition in the cylindrical coordinate system,the analytical temperature field for the primary mirror is calculated by separation of variables and Green's function method.To verify the theoretical model,the temperature distribution of a 2.8 m aperture solid mirror is calculated by the analytical solution.The calculated radial temperature distribution at the optical surface is in good agreement with those of FEA method,which reveal that the analytical solution can well reflect temperature distribution at the optical surface.A lightweighted mirror is equivalent to a thin mirror without ribs in the thermal analysis.The FEA analysis is conducted with both the mirror models,which verifies the validity of the equivalent model.The equivalent analytical calculation results of the temperature field for the lightweighted primary mirror have a significant reference value in the early design of the primary mirror for a large-aperture telescope.关键词
大口径望远镜/轻量化主镜/非稳态导热/温度场Key words
large-aperture telescope/lightweigbted mirror/unsteady heat conduction/temperature distribution分类
能源科技引用本文复制引用
谭玉凤,王继红,任戈,朱福音..大口径轻量化主镜的温度场等效模型理论计算[J].强激光与粒子束,2017,29(6):5-11,7.基金项目
国家高技术发展计划项目 （）
