基于正交实验的主反射镜轻量化设计  

Optimization of Lightweight Structure Design for Primary Mirror Based on Orthogonal Experiment

作　　者：高天元[1] 娄楠 韩旭[1] 林鹤 GAO Tianyuan;LOU Nan;HAN Xu;LIN He(School of Optoelectronic Engineering,Changchun University of Science and Technology,Changchun 130022)

机构地区：[1]长春理工大学光电工程学院

出　　处：《长春理工大学学报（自然科学版）》2019年第3期19-23,共5页Journal of Changchun University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金青年基金(61705018)

摘　　要：采用正交实验的方法对主反射镜的轻量化结构进行优化设计,以Patran&Nastran作为有限元分析平台。按照主反射镜结构优化参数制定正交实验表,根据正交实验表使用SolidWorks软件进行三维参数化建模,使用Patran&Nastran对主反射镜在1G重力释放下进行热力学分析,对节点变形前后坐标位置进行矢高位移计算,得出各组合的RMS值及主反射镜的轻量化比。根据正交实验表分析各因素各水平均值情况,确定各参数的敏感程度并对结果进行优化。结果表明:在主反射镜背面筋厚度为2mm;主反射镜轻量化孔内切圆大小为33mm;反射面厚度为2mm;主反射镜支撑点径向位置圆大小为176mm条件下。主反射镜的RMS值为2.976nm,质量为1.4962kg,轻量化比为75.029%。The orthogonal design method was used to optimize the lightweight structure of primary mirror, and Patran&Nastran were used as the platform for finite element analysis. According to the optimization parameters of the primary mirror structure,an orthogonal experiment table was established,and the SolidWorks software was used to model according to the orthogonal experiment table. The thermodynamic analysis of the primary mirror under the working condition was performed by Patran&Nastran;and the vector height displacement calculation was performed on the coordinate position before and after the deformation of the node. The RMS value of each combination and the lightening ratio of the primary mirror was obtained. According to the orthogonal experimental table,the average value of each factor was analyzed;and the sensitivity of each parameter was determined and the results were optimized. The result is that the thickness of the back-side brace of the primary mirror was 2 mm;the size of the inner circle of lightweight hole was 33 mm;the thickness of the reflecting surface was 2 mm;the radial position of the primary mirror was 176 mm.The RMS was 2.976 nm;the quality of primary mirror was 1.4962 kg;and the weight reduction ratio was 75.029%.

关 键 词：光机热集成分析 正交实验 轻量化 面型 

分 类 号：TN249[电子电信—物理电子学]