Solar-Temperature-Induced Responses of Cable-Net Structure for Supporting Reflector of Large Radio Telescope-FAST
The solar-temperature-induced responses of the cable-net structure supporting the reflector of FAST,five-hundred-meter aperture spherical radio telescope,were analyzed. The integral parametric finite element model of the cable-net structure with its measured landform was built in ANSYS,and the boundary conditions of periodic air temperature,solar radiation,long-wave radiation and shadows of surrounding environment,etc,were computed at an interval of half an hour under a cloudless sky on a summer day as one of the worst-case climates,then the transient structural temperatures were analyzed under sunshine. The according structural thermal deformation and thermal stresses were subsequently computed. Finally,the laws governing the variation and distribution of r.m.s fit errors of the reflector geometry as well as the maximal structural stresses under sunshine were computed. The computational results indicated that the solar temperature field under sunshine is quite non-uniform that the highest local temperature difference of the structure of the reflector went up to 11℃ which made a significant impact on the performance of FAST,and would supply valuable references to the design,construction,monitoring and control of the structure of reflector of FAST.
FAST Solar-temperature-induced responses Cable-net Transient analysis
Xiaofei Jin Feng Fan Shizhao Shen
School of Civil Engineering,Harbin Institute of Technology,Harbin,150090 China
国际会议
哈尔滨
英文
135-143
2008-10-11（万方平台首次上网日期，不代表论文的发表时间）