光电经纬仪主镜面形变化的有限元分析  

Finite Element Analysis for Surface Shape Deformation of Photo-Electronic Theodolite Primary Mirror

作　　者：谭凡教[1] 乔彦峰[1] 李耀彬[1] 高慧斌[1] 刘旨春[1] 

机构地区：[1]中国科学院长春光学精密机械与物理研究所,吉林长春130022

出　　处：《光学学报》2008年第4期756-763,共8页Acta Optica Sinica

基　　金：国家863计划资助课题

摘　　要：为了从整体上了解装配支撑系统后主镜面形变化情况,采用有限元分析方法对某光电经纬仪主镜系统结构进行了分析。在不同倾角下分析镜面及其支撑系统的自重变形,得出镜面及其支撑系统在各个俯仰高度上的变形位移。分析结果表明,在各个倾角状态下,主镜在Z方向上位移较大,最大达1.4μm,造成镜面反射面平移,对反射面焦距有影响;X方向为旋转轴方向,变形较小,为0.01″;Y方向为镜面倾斜方向,变形在0.5″左右,造成镜面弯曲。In order to get reflection surface deformation after assembly of support system, the finite element method （FEM） is used to analyze the primary reflection mirror structure. Surface shape and self-weight deformation of a corbeling system at different tilted angles are analyzed, and deformation displacement on evey pitching height of mirror surface and its corbeling system are obtained. The anlaytical results show at different tilted angles, displacement in Z direction is more than that in X and Y direction, and its maximal displacement is 1.4 μm that translates the reflection surface and changes the focal distance. The deformation of X （slewing axis）direction is 0.01″. And the Y direction is the mirror tilting direction, and its deformation is about 0.5″and bends the mirror surface.

关 键 词：光学设计 光电经纬仪 主镜面形 有限元分析 

分 类 号：V556.5[航空宇航科学与技术—人机与环境工程]