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本文总结了在小风洞中作毫米波射电望远镜天文圆顶复罩方案探讨的试验研究情况。根据在大风洞中对15米口径的毫米波射电望远镜及其圆顶复罩所作的吹风试验结果和对它的分析得到的一些启示,设想了多种天文圆顶结构方案,利用小风洞作了一系列试验研究,以探索减少作用在实抛物面天线上的风载的最佳圆顶结构形式。尤其是期望能减少直接影响到伺服系统和跟踪精度的方位力矩与俯仰力矩。 经过一系列的探索研究,选出了D=28米,H=10米,带有三片阻流板的天文圆顶结构方案。此方案后来在大风洞中作审核定型试验时,得到了肯定。
This paper summarizes the experimental research on the astronomical dome overlay scheme of a millimeter-wave radio telescope in a small wind tunnel. According to the results of the air blowing experiment on the 15 m diameter millimeter-wave radio telescope and its dome overlay in the wind tunnel and some enlightenment from the analysis, a variety of astronomical dome structures are envisioned. By using the small wind tunnel A series of pilot studies have been conducted to explore the optimal dome structure to reduce the wind load acting on real parabolic antennas. In particular, it is expected to reduce the azimuth and pitch moments that directly affect the servo system and tracking accuracy. After a series of exploratory studies, an astronomical domed structure with three baffles was chosen for D = 28 m, H = 10 m. This program was later approved in the wind tunnel stereotypes test, has been affirmed.