4m SiC主镜起吊装置结构设计与分析

Design and analysis of 4m SiC primary mirror handing device structure

根据4 mSiC主镜的结构和材料特性,设计了带有12个底支撑杆的主镜起吊装置。首先确定了起吊装置主体构成包括主体框架、底支撑组件、侧支撑、上压紧等组件。其次运用有限元建模、分析和优化的办法,重点进行了有关主体框架的设计、施力面积的优化以及设计尺寸的优化。分析出了安装存在的误差所导致的3点支撑和主镜倾斜时镜子变形和应力情况,并提出了相应的解决方法。最终确定了起吊装置的最终方案,并按照设计和优化的结果,加工、安装和使用了起吊装置。分析结果和实际应用表明,起吊装置达到了设计要求,可以为类似的结构提供一定的指导。

The primary mirror handing device with 12 axial supporting bars was designed in this paper, according to the structure and material characteristic of 4 m SiC primary mirror. Firstly, it was determined that the handing device consisted of main body frame, axial supports, radial supports and upper compaction. Secondly, with method of finite element model building, analysis and optimization, the design of main body frame, the optimization of application area of force and projected dimension were studied. Thirdly, the mirror deformation plot and stress state and the primary mirror supported by 3 points and tilted caused by the installation error were analyzed. Finally, the final project of handing device was determined, and it was machined, assembled and applied according to the results of the analysis and optimization. The analysis result and practical application indicate that the design requirement of the handing device is achieved, and the direction for similar structure is provided here.