光电工程, 2015, 42 (9): 55, 网络出版: 2016-02-02
大口径望远镜平面止推轴承静力学分析
Static Analysis for the Plane Thrust Bearing of a Large-aperture Telescope
大口径望远镜 平面止推轴承 非接触式位移场测量 有限元分析 large-aperture telescopes plane thrust bearing non-contact measurement of displacement field finite element simulation
摘要
含轴承的轴系结构有限元分析是当前分析的难点, 本文针对大口径望远镜方位轴系平面止推轴承的结构特点, 设计并搭建了基于丹泰克动力学公司光学非接触式位移测量分析系统的平面止推轴承弹性趋近量测试平台。通过对平面止推轴承接触问题的实验研究, 得到了平面止推轴承接触刚度曲线。建立了符合实际工况的有限元分析模型并给出了关键参数的推荐值。结果表明, 所建立的有限元模型仿真结果与实验结果相差不超过 2.47 μm, 最大误差仅为 11%, 验证了有限元模型建立的准确性, 为大口径望远镜方位轴系静力学分析提供了可靠的依据。
Abstract
Finite element analysis of shafting structure containing bearing is difficult in the current. According to the structure of large-aperture telescopes azimuth shafting, we designed and built an experimental platform to measure the elastic approaching of the plane thrust bearing. The experimental platform was based on the Dantec dynamic company’s non-contact measurement and analysis system for displacement. We got the stiffness curve of the plane thrust bearing by the experimental study of the contact problems. A finite element model in line with the actual working conditions was established and the recommended values of key parameters were given. The results show that, compared with the experimental results, the difference of elastic approaching which was calculated by ANSYS is within 2.47 μm and the maximum error is 11%. The results verify the accuracy of the finite element model and provide a reliable basis for the static analysis of the azimuth shafting of large-aperture telescopes.
乔明, 任戈, 谭毅, 向春生. 大口径望远镜平面止推轴承静力学分析[J]. 光电工程, 2015, 42(9): 55. QIAO Ming, REN Ge, TAN Yi, XIANG Chunsheng. Static Analysis for the Plane Thrust Bearing of a Large-aperture Telescope[J]. Opto-Electronic Engineering, 2015, 42(9): 55.