基于风洞试验的二次雷达天线风载特性研究

摘要

The wind torque is generated under the wind load when the antenna is working .It decides the pow-er of the driving motor and the torsion load of the antenna base .In this paper the wind load characteristics of the antenna is researched by fixing the wind balance boards .Firstly, the coefficients of wind resistance and wind torque at different azimuth rotation centers are measured;secondly , experiments are carried out by fixing the wind balance boards on the back of the antenna; finally, the best fixing position of the wind balance boards are obtained by experiments .As a result , the coefficient of the azimuth wind torque is reduced .This can be used as a reference for the design of air traffic control secondary surveillance radar antenna .%天线工作时经常受到风载荷作用而产生风力矩，该力矩决定天线驱动电机的功率和安装基础的扭转负载大小。文中通过安装风力平衡板对天线风载特性进行了研究。首先测出了天线不同方位转动中心的风阻力和风力矩系数，然后在天线背面安装风力平衡板进行试验，最后通过试验确定平衡板的最佳安装位置，有效减小了方位风力矩系数。该研究可为航管二次雷达天线的设计提供参考。