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天线面板在长时间的日照作用下,会因为热作用产生变形,了解天线面板的热变形,关键在于确定面板的温度场分布。在日照作用下,同样考虑天线自身的遮挡,其面板热分布显得比较复杂,难以确定。基于ASHRAE晴空模型,结合北京晴空模型的系数迭代回归公式,重点考虑了天线面板在夏至日受太阳辐射、与空气对流换热以及周围环境长波辐射等条件下的热流变化情况,利用有限元分析软件对天线面板在该天的温度场进行了数值模拟,给出了面板温度随时间的变化规律,有助于更好地了解天线面板变形和天线指向的校准。
Antenna panel in a long period of sunshine, will be deformed due to thermal effects, to understand the thermal deformation of the antenna panel, the key is to determine the panel temperature distribution. Under the action of sunshine, the same consideration is given to the shielding of the antenna itself. The heat distribution of the panel is complicated and difficult to determine. Based on the ASHRAE clear sky model and the coefficient iterative regression formula of the Beijing clear sky model, the heat flow of the antenna panel during the summer solstice by the solar radiation, convection heat transfer and the long-wave radiation of the surrounding environment are mainly considered. The finite element analysis software The temperature field of the antenna panel was numerically simulated on that day, and the variation rule of the panel temperature with time was given, which helps to better understand the deformation of the antenna panel and the alignment of the antenna.