摘要
四翼十字形中心支撑结构是大型望远镜中次镜支撑的典型结构,其动力学性能直接决定着光学成像视轴的稳定性和精确性。基于板壳理论,采用Rayleigh方法,通过选取恰当的振型函数,建立了次镜支撑结构的动力学模型。针对支撑筋板不同的结构参数,分别进行了数值仿真和有限元分析,二者规律相同,结果基本一致,认为该方法可以用于类似结构动力学特性的计算。
Supporting structure of crossed-plate type is a typical secondary mirror supporting structure for a large-scale telescope, which determines the stability and veracity of LOS. A dynamic model has been established by selecting mode functions using the plate and shell theory and Rayleigh method. Numerical simulation and finite element analysis done with different structural parameters show that they both follow the same law and their results are generally in agreement, and therefore, this method can be used for calculating dynamic properties of similar structures.
出处
《光学精密工程》
EI
CAS
CSCD
2003年第5期472-476,共5页
Optics and Precision Engineering
