典型文献
Thermal Analysis of the Backup Structure of the Tianma Telescope
文献摘要：
Taking the Tianma Radio Telescope(TMRT)as an object,this paper focuses on the determination of temperature gradients and thermal deformations of the backup structure(BUS)with the finite element method.To this end,a modeling and analysis method,which consists of a simplified FEM and a four-component simulation process,is proposed.In the development,only solar radiation is considered and thermal convection is neglected.Based on the thermal time constant of the BUS,the simulations of temperature gradients are simplified as static analysis.The superposed temperature gradients agree well with the ones measured by thermometers with a 0.57℃root mean square(rms)error.In addition,the illuminated-weighted rms errors of the primary reflector surface calculated by the simulation and measured by the extended out-of-focus holography are in good agreement.The rms error increases approximately 170 μm when the Sun persistently illuminated the BUS for 3 hr.The optimized initial temperature of the antenna structure is 20℃by comparing the results between the finite element analysis and the e-OOF measurement.The thermal deformation database can support the real-time compensation of the active surface system if the traces of the radio telescope are known in advance.
文献关键词：
中图分类号：
作者姓名：
Li Fu;Lin-Feng Yu;Jian-Sen Tang;Bing-En Yang;Wei Gou;Jin-Qing Wang;Qing-Hui Liu;Zhi-Qiang Shen
作者机构：
Shanghai Astronomical Observatory,Chinese Academy of Sciences,Shanghai 200030,China;Key Laboratory of Radio Astronomy,Chinese Academy of Sciences,Nanjing 210033,China;Chongqing Jiaotong University,Chongqing 400074,China;Aerospace and Mechanical Engineering,University of Southern California,Los Angeles,CA 90089-1453,USA
文献出处：
引用格式：
[1]Li Fu;Lin-Feng Yu;Jian-Sen Tang;Bing-En Yang;Wei Gou;Jin-Qing Wang;Qing-Hui Liu;Zhi-Qiang Shen-.Thermal Analysis of the Backup Structure of the Tianma Telescope)[J].天文和天体物理学研究,2022(10):111-120
A类：
TMRT,thermometers,OOF
B类：
Thermal,Analysis,Backup,Structure,Tianma,Telescope,Taking,Radio,object,this,paper,focuses,determination,temperature,gradients,thermal,deformations,backup,structure,BUS,finite,element,method,To,modeling,analysis,which,consists,simplified,FEM,four,component,process,proposed,In,development,only,solar,radiation,considered,convection,neglected,Based,constant,simulations,static,superposed,well,ones,measured,by,root,mean,square,rms,addition,illuminated,weighted,errors,primary,reflector,surface,calculated,extended,out,holography,good,agreement,increases,approximately,when,Sun,persistently,hr,optimized,initial,antenna,comparing,results,between,measurement,database,can,support,real,compensation,active,system,traces,radio,telescope,known,advance
AB值：
0.553683
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