基于有限元法的主镜底支撑的优化分析  

Optimization analysis for the underside support of the primary mirror by the finite element method

作　　者：徐加慧[1] 夏立新[1] 陈诚[1] 

机构地区：[1]中国科学院南京天文仪器研制中心,南京210042

出　　处：《机械设计与制造》2004年第3期67-69,共3页Machinery Design & Manufacture

摘　　要：如何确定镜子的最佳支撑方式,来保证最优的镜面面形精度,这在天文望远镜的光学成像系统中具有重要的意义。应用了有限元分析方法分析了镜面的变形,利用有限元分析软件ANSYS中高级优化模块(OPT模块)以镜面变形最小为优化目标对主镜底支撑进行了优化设计。以九点浮动底支撑的优化作了实例分析,并与传统经验法的计算结果进行了对比分析,结果表明文中所采用的优化方法具有较大的优越性。How to design the best support of the mirror to ensure the highest accuracy of the mirror surface, which is very significant for the optical and image system of the astronomical telescope. In this article the deformation of a mirror is analyzed by the finite element method. The mode of underside support of a primary mirror is optimized by the advanced optimize module of the finite element software named ANSYS. The object of optimization is the minimal deformation of the mirror surface. The nine points underside support mode is an example for optimization. The results of optimization method are compared with those of the traditional method and it proves that the optimization method adopted in this article is superior.

关 键 词：有限元方法 优化方法 底支撑 镜面变形 

分 类 号：O242.21[理学—计算数学]