中国光学, 2016, 9 (6): 704, 网络出版: 2016-12-06   

长条形空间反射镜无热化胶层的优化设计

Optimization design of athermal adhesive for rectangular space mirror
作者单位
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
2 中国科学院大学, 北京 100049
摘要
为了实现尺寸为1 200 mm×484 mm的大长宽比长条形空间反射镜的无热装配, 减小反射镜面形精度受热应力的影响, 本文对环氧胶(GHJ-01(Z))胶层厚度对反射镜面形的影响及胶层在静、动力学载荷下的应力进行了研究。首先, 介绍了现有的几种基于胡克定律推导的无热粘结厚度方程及其假设条件, 并推导了带有锥度的背部盲孔反射镜无热粘结胶层厚度的方程, 得出无热粘结胶层厚度曲线; 然后, 建立了6种不同胶层厚度的反射镜组件模型并进行了分析与比较。通过分析, 在+5 ℃温升工况下, 反射镜胶层厚度为007 mm时具有最好的面形精度, 其RMS值00178λ, 其检测方向在自重作用下的面形精度RMS值为00173λ, 一阶频率为22017 Hz; 最后对胶层无热化设计后的反射镜组件进行了振动试验和粘结剂剪切强度试验, 分析与试验表明: 反射镜组件一阶频率为2164 Hz, 与有限元分析结果相对误差为171%; 满足动静态刚度要求; 同时, 在动力学载荷下该厚度胶层的应力均小于其固化后的抗剪强度, 安全裕度为246; 各项指标满足设计要求。
Abstract
In order to realize the athermal assembling of rectangular special mirror with large dimension of 1 200 mm×485 mm, and reduce the effect of hot stress on primary mirror′s surface figure precision, the effect of epoxy thickness on the surface figure accuracy of the mirror and the stress of epoxy under static and dynamic conditions are researched. First of all, several already existing athermal adhesive thickness equations obtained based on Hooke′s law are introduced. The athermal adhesive thickness equations of the primary mirror which has blind holes with taper in the back is developed, and the curve of athermal adhesive thickness is obtained. Then six modes of mirror with different adhesive thickness are made. The result of analysis shows that the mirror′s RMS are 00178λ(optical value) and 00173λ(gravity in detecting′s directions) under 5 ℃ uniform temperature rise when the epoxy thickness is 007 mm. Finally, vibration tests of mirror components and drawing test of epoxy are conducted. Analysis and experiment results indicate that its first order frequency is 2164 Hz and the error between them is 171%. The maximum stress of epoxy under dynamic conditions is smaller than the shear strength which is 302 MPa, obtained through drawing test of Epoxy, and the safety margin is 246. All indicators meet the design requirements.

李梦庆, 张雷, 邢利娜, 李宗轩. 长条形空间反射镜无热化胶层的优化设计[J]. 中国光学, 2016, 9(6): 704. LI Meng-qing, ZHANG Lei, XING Li-na, LI Zong-xuan. Optimization design of athermal adhesive for rectangular space mirror[J]. Chinese Optics, 2016, 9(6): 704.

本文已被 3 篇论文引用
被引统计数据来源于中国光学期刊网
引用该论文: TXT   |   EndNote

相关论文

加载中...

关于本站 Cookie 的使用提示

中国光学期刊网使用基于 cookie 的技术来更好地为您提供各项服务,点击此处了解我们的隐私策略。 如您需继续使用本网站,请您授权我们使用本地 cookie 来保存部分信息。
全站搜索
您最值得信赖的光电行业旗舰网络服务平台!