球形经纬仪四通结构分析与优化  

Analysis and optimization of the four-way body for spherical theodolite

作　　者：王从敬 牛文达[1] 王冲 闫佳钰 王晶[1] Wang Congjing;Niu Wenda;Wang Chong;Yan Jiayu;Wang Jing(Changchun Institute of Optics Fine Mechanics and Physics,Chinese Academy of Sciences,Jilin Changchun,130033,China)

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130033

出　　处：《机械设计与制造工程》2023年第3期15-19,共5页Machine Design and Manufacturing Engineering

基　　金：中国科学院战略高技术创新基金资助项目(GORC-19-13)。

摘　　要：为提高四通的刚度,对直径1000 mm的类球体四通进行结构优化。根据有限元法,对负载条件下的四通进行静力学分析,得到其最大变形量和最大应力值及所在位置。通过在四通应力较大、刚度较弱的部位增加加强板,可以减小传感器安装板跨距,同时形成更加稳定的三角形结构,从而提高四通的承载能力。以光轴水平时为例,优化后四通的最大变形量从0.07 mm减小至0.04 mm,最大应力值从2.68 MPa减小至1.01 MPa。对比优化前后不同俯仰角下四通的变形情况,结果表明优化后的四通不仅具有更小的变形量,同时也具有更加稳定的结构;经模态分析对比,优化后的四通具有更好的动态刚度。In order to improve the stiffness of the four-way,the structure of sphere-like four-way with a diameter of 1000 mm is optimized.The static analysis of the four-way under load conditions is carried out by using the finite element method.Then the maximum deformation and maximum stress value and location of the four-way are obtained.The reinforcing plate is added to the part where the stress is large and the rigidity is weak.So the span of the sensor mounting plate is reduced,and a more stable triangular structure is formed.The bearing capacity of the four-way is increased.Taking the optical axis as an example,the maximum deformation of the optimized four-way is reduced from 0.07 mm to 0.04 mm,and the maximum stress value is reduced from 2.68 MPa to 1.01 MPa.The results of the four-way under different pitch angles show that the optimized four-way has smaller deformation and better structural stability.The modal analysis of four-way indicates the optimized one also has better dynamic stiffness.

关 键 词：球形经纬仪 结构优化 有限元 四通 

分 类 号：TH745[机械工程—光学工程]