Study On The Tube Structural Design Of A Ring Solar Telescope

This article was based on the main specifications of the ring solar telescope mechanical system and the design requirements of the tube.According to structural design requirements and environmental constraints,combined with actual working conditions,detailed design and analysis of each part were completed.The main aspects were as follows:Firstly,the optical system characteristics and mechanical system indexes of the tube were analyzed based on the overall requirements of the 2m ring solar telescope.The design requirements of its structure were proposed so that the basic design shape of the tube was given,and the characteristic parameters of each part of it were estimated.The parameters set requirements for the detailed design of the subsequent work.Secondly,based on the main indicators of the telescope and the design requirements of the tube,the mechanical structure of each component was designed and analyzed in detail.The finite element optimization design method was used to analyze and select the type of the truss and optimize the calculation of key parameters to obtain the final structural design results of the truss and the middle block.At this time,the maximum deformation values of the two were 0.037mm and 0.017mm,respectively.According to the structure of the main mirror support design,by optimizing the radius of the main mirror support ring,the RMS of the main mirror was 5.1nm when the optical axis was vertical,and the random distribution analysis of the bottom support force showed that the optimized distribution was reasonable.Then the bottom support,the side support,the chamber and protection device structures of it were designed in detail.The design parameters were obtained by optimizing the support ring radius of the secondary mirror,and the minimum RMS value of the sub-mirror at this time was 4.8nm.Subsequently,the supporting structure and chamber of the sub-mirror were designed in detail,and the design result was finally obtained.Finally,according to the overall final structure,the finite element analysis of the mechanical structure of the tube components was carried out.Static analysis was used to analyze the key components and the result revealed that the deformation of the key components of the tube could meet the requirements of the technical indexes.Thermal analysis was performed on the main mirror and sub-mirror,and it was determined that the working conditions within the operating temperature range could meet the requirements of Observation.The modal analysis method was used to calculate the natural frequency of the tube,so as to judge the rationality of the tube design.At the end,wind load analysis was performed on the tube under the wind load condition of the telescope.Based on this,it was judged that the tube design could meet the wind load work requirements.