基于NURBS的反射面天线结构和辐射性能分析  

Analysis of Reflector Antenna Mechanical and Radiation Performance Based on NURBS

作　　者：雷震 任毅行 陈浩祥 刘宇华 赵武林 李东伟 LEI Zhen;REN Yixing;CHEN Haoxiang;LIU Yuhua;ZHAO Wulin;LI Dongwei(School of Construction Machinery,Chang’an University,Xi’an,Shaanxi 710000,China;The 39th Research Institute of China Electronics Technology Group Corporation,Xi’an,Shaanxi 710016,China)

机构地区：[1]长安大学工程机械学院,陕西西安710000 [2]中国电子科技集团公司第三十九研究所,陕西西安710016

出　　处：《北京理工大学学报》2023年第7期764-772,共9页Transactions of Beijing Institute of Technology

基　　金：陕西省自然科学基础研究计划面上项目(2021JM—150);国家自然科学基金资助项目(12203008);长安大学中央高校基本科研业务费专项资金资助项目(300102253204)。

摘　　要：大型反射面天线在各类结构载荷作用下会发生变形,从而影响其电磁性能,一般通过机电耦合分析来评估力学载荷对电磁性能的影响.针对传统机电耦合分析存在的模型异构、网格转换过程繁琐、几何精度损失,进而导致的分析效率低和效果差的问题,本文提出了一种采用非均匀有理B样条(NURBS)进行几何建模、结构计算及电磁分析的机电耦合分析框架,通过案例证明了本方法的便捷性和高效性,为计算结构载荷作用下的反射面天线辐射方向图和天线机械误差研究提供了有力的工具.Large reflector antennas are deformed under various structural loads,which will deteriorate their electromagnetic performance.Electro-mechanical analysis is often used to predict the impact of loads on electromagnetic performance.To deal with the problems of low analysis efficiency and poor effect caused by heterogeneous models,trivial grid conversion process and loss of geometric accuracy in traditional electromechanical coupling methods,in this paper,an electromechanical coupling analysis framework was proposed based on non-uniform rational B-splines(NURBS)for geometric modeling,structural and electromagnetic analysis,and the convenience and efficiency of this method were proved by cases.This framework provides a powerful tool for radiation pattern analysis of mechanically distorted reflector antennas and antenna tolerance research.

关 键 词：天线机械误差 天线公差 天线辐射方向图 机电耦合 几何模型 等几何分析 物理光学 

分 类 号：TN822[电子电信—信息与通信工程]