天线双弯曲副反射面的有限元分析

天线双弯曲副反射面的有限元分析

内容简介：在星载雷达天线系统中,为了产生可变的远场辐射模式,通常将雷达天线的副反射面设计成机械可调结构,从而通过副反射面的形变获得不同的照射波束。文中利用有限元方法,在分析副反射面的形变时,将三角壳元分解为平面内伸缩与平面外偏转两种运动方式,从理论上推导了三角壳元的应力-位移公式,从而快速得到副反射面的全局位移矢量,极大地减少了系统的计算时间,提高了系统的反应速度。

Abstract：In satellite-borne antenna system,the subreflector of radar antenna is usually designed to be mechanically adjustable structure for generating the variable far-field patterns.With the deformable subreflector,the electromagnetic field illuminating the main reflector can be changed,leading to a different radiation beam.For analyzing the deformation of the subreflector,the finite element model is introduced,in which the behavior of the triangular shell elements is considered in two independent parts: an in-plane elasticity and an out-of-plane bending motion,then the stress-displacement formula is deduced theoretically.That leads to a relatively fast solution to global displacement vector of subreflector and a quick system response.

作者：付国华, 梁峻强,

关键词：双弯曲副反射面, 天线系统设计, 有限元分析, 机械可调,