复合材料天线罩形变夹具设计与试验

Design and experiment of deformation fixture for composite radome

反射面天线具有结构简单、可靠性高、增益高、副瓣低等特点,广泛应用于射电天文、载人航天等重大工程项目中。随着科学技术的发展,对反射面天线电性能的要求愈来愈严苛,而天线的机械结构是实现天线电性能的载体,合理设计天线的机械结构是提高天线电性能的一个关键因素。传统的天线结构性能评估方案依赖有限元仿真与风洞试验,但有限元仿真过于理想化,不能反映天线的真实刚度信息,而风洞试验价格昂贵,这些约束限制了载荷作用下的天线电性能评估。文中以某雷达天线为研究对象,设计了一种针对中小型天线罩的形变测量装置,能准确测量天线罩在模拟风载下的形变信息,通过测量信息可以计算载荷作用下天线的电磁性能,达到评估天线罩结构性能和天线电磁性能的目的。

The reflector antenna has the characteristics of simple structure,high reliability,high gain,low sidelobe,and is widely used in major engineering projects such as radio astronomy and manned spaceflight.With the development of science and technology,the requirements for the electrical performance of reflector antennas are becoming more and more stringent,and the mechanical structure of the antenna is the carrier to realize the electrical performance of the antenna.A reasonable design of the mechanical structure of the antenna is a key factor to improve the electrical performance of the antenna.Traditional antenna structure performance evaluation schemes relies on finite element simulation and wind tunnel tests.However,finite element simulations are too idealized structure to reflect the real stiffness information of the antenna,and wind tunnel experiment is expensive.These constraints limit the antenna’s electrical performance under load.This paper takes a radar antenna as the research object,and designs a deformation measurement device for small and medium-sized radomes,which can accurately measure the deformation information of the radome under simulated wind loads.Through the measurement information,the electromagnetic radiation of the antenna under the load can be calculated.Meanwhile,achieve the purpose of evaluating the structural performance of the radome and the electromagnetic performance of the antenna.