光学学报, 2012, 32 (12): 1212005, 网络出版: 2012-10-12
大口径旋转偏摆棱镜径向支撑优化设计
Optimization Design of Radial Support for Large-Aperture Rotating and Tilting Prism
光学器件 径向支撑 有限元分析 两步优化 扫描镜 optical devices radial support finite element analysis two-step optimization scanner
摘要
支撑方式对大型光学元件的镜面变形及应力集中具有重要影响。以大口径、非均匀质量分布、二维旋转棱镜为研究对象,综述了多点支撑和面支撑方式,提出了可调分段面支撑方法,并给出具体的方案设计。系统地分析了面支撑方式下棱镜的运动过程,得到最危工况。采用两步优化方法对该工况下的支撑夹角进行优化,优化后棱镜运动过程中的最大变形峰谷值与最大等效应力值相比优化前分别减小了7.40%和11.45%,支撑效果得到了明显改善,验证了该支撑方式的合理性及可行性。
Abstract
The supporting way is crucial to the deformation and stress concentration of any optical elements. As the large-aperture prism is characterized with non-uniform quality, rotating and titling motion, an adjustable segment-surface support way is proposed, and its specific program is designed. This paper analyzes the motion process under this support and gets the most dangerous condition. The optimization of the supporting angle under the condition is also made by the two-step optimization method, as a result, the maximum deformation peak-to-valley (PV) value and von Mises stress value in dynamic process have respectively decreased by 7.40% and 11.45% after optimization, which validates the feasibility and rationality of the optimized support way.
李安虎, 李志忠, 孙建锋, 卞永明, 刘立人. 大口径旋转偏摆棱镜径向支撑优化设计[J]. 光学学报, 2012, 32(12): 1212005. Li Anhu, Li Zhizhong, Sun Jianfeng, Bian Yongming, Liu Liren. Optimization Design of Radial Support for Large-Aperture Rotating and Tilting Prism[J]. Acta Optica Sinica, 2012, 32(12): 1212005.