大口径多组元透镜的固定结构设计及动力学分析  

Dynamic Analysis and Design for Supporting Structure of Large Aperture Mirrors

作　　者：贾庆莲[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,长春130033

出　　处：《长春理工大学学报（自然科学版）》2012年第3期1-3,共3页Journal of Changchun University of Science and Technology(Natural Science Edition)

基　　金：国家863高技术研究发展计划资助项目

摘　　要：针对镜头中大口径多组元透镜组的固定支撑结构进行了设计,采用有限元分析方法,利用Ansys软件对其固定镜筒的厚度及结构进行了一阶谐振频率及变形分析。仿真试验结果表明采用在镜筒、隔圈和压圈的简单结构的悬壁端增加一个由四个球头顶丝组成的辅助支撑的结构,能降低透镜组的整体变形量。固定镜筒厚度的增加对透镜组的一阶谐振频率影响不大,但会造成一阶谐振频率的下降。增加镜筒厚度,由于固定结构的刚度提高,由此引起轴向变形会降低,但采用所设计的固定结构后,针对不同的镜筒厚度其轴向变形在0.015μm到0.018μm之间,能满足光学设计的要求。The first order resonant frequency and deformalion of supporting structure of large aperture mirrors were analyzed by finite element analysis to the drawtube thickness and the structure. The simulation results showed for the slructure of drawtube, partition circle and impaction circle, if a assistant supporting structure of four globular bolts was appended at the cantilever, the deformation was smaller. The first resonant frequency was descended little when the draw tube thickness was increased. Axis direction deformation was descended for the rigidity increasing as the drawtube thick-ness increasing. If the supporting structure was imposed, the axis-direction deformation was from 0.015μm to 0.018μm in despite of the different drawtube thickness which is to be contented to optical design.

关 键 词：大口径多组元透镜 固定结构 变形 有限元分析 

分 类 号：TN21[电子电信—物理电子学]