基于NURBS的反射面天线结构和辐射性能分析雷震1,2,任毅行1,陈浩祥1,刘宇华1,赵武林2,李东伟2(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)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.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;物理光学中图分类号:TN822文献标志码:A文章编号:1001-0645(2023)07-0764-09DOI:10.15918/j.tbit1001-0645.2022.170AnalysisofReflectorAntennaMechanicalandRadiationPerformanceBasedonNURBSLEIZhen1,2,RENYixing1,CHENHaoxiang1,LIUYuhua1,ZHAOWulin2,LIDongwei2(1.SchoolofConstructionMachinery,Chang’anUniversity,Xi’an,Shaanxi710000,China;2.The39thResearchInstituteofChinaElectronicsTechnologyGroupCorporation,Xi’an,Shaanxi710016,China)Abstract:Largereflectorantennasaredeformedundervariousstructuralloads,whichwilldeterioratetheirelec-tromagneticperformance.Electro-mechanicalanalysisisoftenusedtopredicttheimpactofloadsonelectromag-neticperformance.Todealwiththeproblemsoflowanalysisefficiencyandpooreffectcausedbyheterogen-eousmodels,trivialgridconversionprocessandlossofgeometricaccuracyintraditionalelectromechanicalcouplingmethods,inthispaper,anelectromechanicalcouplinganalysisframeworkwasproposedbasedonnon-uniformrationalB-splines(NURBS)forgeometricmodeling,structuralandelectromagneticanalysis,andtheconvenienceandefficiencyofthismethodwereprovedbycases.Thisframeworkprovidesapowerfultoolforradiationpatternanalysisofmechanicallydistortedreflectorantennasandantennatoleranceresearch.Keywords:antennamechanicalerrors;antennatolerance;antennaradiationpattern;electro-mechanicalco...