To grasp the effect of nonuniform temperature field, the effects of a nonuniform sunshine temperature field on a large, all-movable radio telescope were analyzed in this study. Based on the overall parameters of a radio telescope model, first, several specific steps of the ray-casting algorithm were introduced for calculating sunlight shadows on radio telescopes, and then a special program was developed for simulating sunlight and shadows on radio telescopes. Second, the periodic air temperature, heat radiation, and heat conduction were computed every half hour under a cloudless sky on a summer day, i.e., the worst-case climate conditions. The transient structural temperatures were then analyzed over a period of several days of sunshine with a rational initial structural-temperature distribution until the whole set of structural temperatures converged to the results obtained the day before. As a result, the temporal and spatial characteristics of the temperature distribution for the radio telescope were statistically investigated. Furthermore, the phenomenon called the solar cooker effect was found to exist in such a Cassegrain reflector system. The variations in the solar cooker effect over time and its spatial distributions in the secondary reflector were observed to elucidate the mechanism of the effect. The results presented here provide some references for the future operation, sensor distribution, and local temperature control of radio telescopes.

中文翻译：

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在全移动射电望远镜上研究太阳辐射

为了掌握非均匀温度场的影响，本研究分析了非均匀日照温度场对大型全移动射电望远镜的影响。基于射电望远镜模型的整体参数，首先介绍了射线投射算法的几个具体步骤，用于计算射电望远镜上的太阳光阴影，然后开发了一个专门的程序来模拟射电望远镜上的太阳光和阴影。其次，在夏季无云的天空下每半小时计算一次周期性气温、热辐射和热传导，即最坏的气候条件。然后在具有合理初始结构温度分布的几天日照期间分析瞬态结构温度，直到整个结构温度集收敛到前一天获得的结果。结果，对射电望远镜温度分布的时空特征进行了统计研究。此外，发现在这种卡塞格林反射器系统中存在称为太阳灶效应的现象。观察太阳能炊具效应随时间的变化及其在二次反射器中的空间分布，以阐明该效应的机制。研究结果为射电望远镜未来的运行、传感器分布和局部温度控制提供了一些参考。