矩形平面天线风荷载的实验研究

Experimental investigation of Wind Loads on Rectangle Planar Antennas

摘要: 车辆和舰船等上使用的移动雷达天线必须满足结构重量轻、风荷载小、对其不同方位易于操纵和控制等特点，以便达到准确、快捷、高效的应用目的。文中在西北工业大学NF-3风洞采用测力法对具有不同镂空度的车载矩形平面天线风荷载进行了实验研究。介绍了实验设备、模型构造和实验技术，给出了典型的实验结果，并进行了分析。实验结果表明，实体平面天线的最大阻力系数和方位力矩系数分别为1．8775和0．1350，而镂空度为50％的栅状平面天线的最大阻力系数和方位力矩系数分别为0．8500和0．0624，后者的阻力系数和方位力矩系数仅分别为前者的45％和46％。

Abstract: This paper briefly summarizes the features of wind loads on planar antennas based on test resuhs in NF-3 wind tunnel, describing subjects for experimental equipments, technique, and scaled model construction. It is shown that the maximum coefficient of drag force and yawing moment is 1.8775 and 0.1350, respectively for solid antennas. In contrast, grid antennas with a void ratio of 50%, the maximum coefficient of drag force is 0.8500, the maximum coefficient of yawing moment is 0.0624, the latter is 45% and 46% of the former respectively, so the manipulation of antenna will be accurate, quick, and efficient.