光学精密工程2017，Vol.25Issue(5)：1242-1249,8.DOI:10.3788/OPE.20172505.1242
X射线聚焦望远镜镜片黏接装配的数值模拟和分析
Numerical simulation and analysis of X-ray focusing telescope in mounting process
摘要
Abstract
The surface errors in mounting process of a mirror used in the X-ray focusing telescope with a nested conical approximation Wolter-I type structure was simulated and analyzed for an X-ray Timing and Polarization (XTP) satellite.Firstly, the 2-D finite element model was established based on ANSYS.Then, by taking the actual jig and mounting process as loading and boundary conditions, the curvilinear relationship between surface error and loading on three bars was obtained through the analysis of mounting process of the mirror with different radii and the optimized loadings according to different mirrors were selected.Analysis results show that the minimum surface error is less than 0.1 μm according to the optimized loading and satisfies the accuracy requirement.Moreover, the maximum stresses in the mirror are less than the ultimate strength of glass and maintain the reliability in mounting process.A 3-D model was established to compare with the 2-D model for deviation analysis.Results show that the main calculating deviation is 2.3 μm at front and back sections of the mirror in length about 5 mm.The calculating deviation at middle of mirror is less than 0.03 μm.The research show that the 2-D model could be used in the fast surface error analysis and loading confirmation.According to the analysis of mirror mounting process, the accurate mechanics analysis could provide academic bases and references for improving mounting accuracy.关键词
X射线聚焦望远镜/镜片装配/面形偏差/载荷分析/有限元法Key words
X-ray focusing telescope/mirror mounting/surface error/loading analysis/finite element method分类
机械制造引用本文复制引用
贺鹏飞,尤佳伟,戴瑛,沈正祥,王占山..X射线聚焦望远镜镜片黏接装配的数值模拟和分析[J].光学精密工程,2017,25(5):1242-1249,8.基金项目
国家自然科学基金资助项目(No.11427804) （No.11427804）
中央高校基本科研业务费专项资金资助项目 （）
