光学精密工程2011，Vol.19Issue(1)：138-145,8.DOI:10.3788/OPE.20111901.0138
地基大口径望远镜结构的性能分析
Structural analysis of ground-based large telescopes
摘要
Abstract
To research the performance of ground-based large telescopes and to optimize the design and structures of telescopes, the finite element analysis for the whole assembly was performed. For a 1.23 m telescope,the structural characteristics of main parts and their relation were studied, several kinds of simplification methods for some parts were discussed and a precise finite element model of the whole telescope assembly was established. Moreover,the gravity deformations of the telescope in both zenith and horizon pointing states were calculated and the deformation results of the primary mirror and the secondary mirror were given. Finally, the telescope assembly dynamic responses due to the wind loading and seismic excitation were analyzed. The obmined results show that wind loading will induce the optical axis misalignment of the primary mirror and secondary mirror, and the misalignment error RMS value is allowable in 0. 025". The displacements along three orthogonal directions induced by seismic excitation are greater, but the maximum stress is only 16.67 MPa,which cannot bring the damage to telescope structures.关键词
大口径望远镜/有限元分析/风载/地震波Key words
large telescope/ finite element analysis/ wind loading/ seismic excitation分类
机械工程引用本文复制引用
周超,杨洪波,吴小霞,张景旭..地基大口径望远镜结构的性能分析[J].光学精密工程,2011,19(1):138-145,8.基金项目
中国科学院长春光学精密机械与物理研究所三期创新重大研究项目专项资金资助 （）
