压弯椭圆柱面镜的有限元分析
The finite element analysis of the bent elliptical cylindrical mirror
秦超 1薛松 2王楠 2孙小沛 2祝万钱2
作者信息
- 1. 中国科学院上海应用物理研究所张江园区 上海 201204;中国科学院大学 北京 100049
- 2. 中国科学院上海应用物理研究所张江园区 上海 201204
- 折叠
摘要
针对上海同步辐射光源二期部分线站对压弯椭圆柱面镜的需求,研制出了一种双拉杆压弯机构.对该机构进行理论计算与分析,建立压弯机构的三维模型,对其进行有限元分析.分别分析了水平聚焦、垂直聚焦、和垂直聚焦(有重力补偿)情况下的面形误差.水平聚焦,拉杆位移分别为9.2 mm、10.1 mm,可以获得与理论椭圆相比面形误差为0.35μrad的椭圆面形;垂直聚焦,拉杆位移分别为7.4 mm、8.4 mm,面形误差为0.88μrad,误差较大,所以该机构中需要加装重力补偿装置;使用三点重力补偿,加载合适的补偿力,最终得到拉杆位移分别为9.1 mm、10.1 mm,面形误差为0.45μrad,满足设计要求.
Abstract
[Background] Bent elliptically cylindrical mirror is required for some beam lines of the 2nd phase of Shanghai synchrotron radiation facility (SSRF). A double rod bending mechanism has been developed accordingly. [Purpose] This paper aims to bend an elliptical cylindrical mirror we need by using this mechanism. [Methods] Theoretical calculation and analysis combined with finite element analysis were carried out on this mechanism. [Results] In horizontal focusing, when the displacements of the rod were 9.2 mm and 10.1mm, the slope error was 0.35μrad. In vertical focusing, if not using the gravity compensation mechanism, the slope error was 0.88μrad when the displacements of the rod were 7.4 mm and 8.4 mm, so the gravity compensation mechanism is necessary, and now when the displacements of the rod were 9.1 mm and 10.1 mm, the slope error was 0.45μrad. [Conclusion] The results can meet our requirements, and this analysis result is useful for the engineering application.
关键词
压弯/椭圆柱面/有限元分析/面形误差Key words
Bending/Elliptically cylindrical/Finite element analysis/Surface-shape error引用本文复制引用
出版年
2018
NETL
NSTL
维普
万方数据