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全可动射电望远镜结构工作时需要在两个方位进行变位旋转,其迎风姿态多样、反射面风压分布复杂。为掌握反射面结构风荷载分布特性及获取相应的荷载取值,选取了待建的新疆110 m(F/D=0.3)望远镜反射面结构为切入点,首先采用计算流体力学软件FLUENT,对其表面平均风压分布进行数值模拟,并展开相应的风洞试验研究,来验证CFD模拟反射面平均风压分布的有效性。通过对比数值模拟与试验结果,揭示出旋转抛物反射面的风荷载特性。随后以数值模拟为研究手段,对其他若干反射面结构进行基于望远镜变位过程的全方位分析,给出不同口径、不同焦径比的反射面风荷载特性分析结果,为日后旋转抛物反射面抗风设计提供较为充分的资料。
All-movable radio telescope structure work needs to be rotated in both directions of rotation, the windward attitude varied, the reflection surface of the wind pressure distribution is complicated. In order to grasp the wind load distribution characteristics of reflector structure and obtain the corresponding load values, the reflector structure of the 110 m (F / D = 0.3) telescope to be built is selected as the entry point. Firstly, computational fluid dynamics software FLUENT The mean wind pressure distribution on the surface is numerically simulated and corresponding wind tunnel tests are carried out to verify the effectiveness of the average wind pressure distribution on the simulated reflector surface of CFD. By comparing numerical simulation and experimental results, the wind load characteristics of rotating parabolic reflector surface are revealed. Then, numerical simulation is used as a research method to conduct the omni-directional analysis based on the telescope displacement process of several other reflecting surface structures. The analysis results of the wind load characteristics of the reflecting surface with different diameters and different coke-in-diameter ratios are given. Wind design to provide more adequate information.