星载天线副反射面支撑结构优化分析  

Optimization of Subreflector Support Structure for Spaceborne Antenna

作　　者：杨留义 刘越东 史永康 YANG Liuyi;LIU Yuedong;SHI Yongkang(Beijing Research Institute of Telemetry,Beijing 100076,China)

机构地区：[1]北京遥测技术研究所,北京100076

出　　处：《电子机械工程》2025年第1期7-10,64,共5页Electro-Mechanical Engineering

摘　　要：为减小星载天线副反射面支撑结构的质量,采用有限元方法建立典型副反射面支撑结构分析模型,通过控制变量法分析支杆截面外径、壁厚、支杆与天线的轴向夹角等参数对副反射面支撑结构固有频率的影响。以副反射面承力区域质量最小为优化目标,以固有频率为约束条件,采用有限元方法对副反射面承力区域进行拓扑优化。分析结果表明:在结构质量相同的情况下,采用六支杆方案可获得较高的固有频率;对于三支杆和四支杆方案,随着支杆与天线轴向夹角的增大,副反射面支撑结构的固有频率先增大后减小;对于六支杆方案,支撑结构的固有频率随支杆与天线轴向夹角的增大而减小。相比初始设计状态,拓扑优化后副反射面承力区域的质量减小了约75.28%。To achieve the lightweight design of the subreflector support structures for a spaceborne antenna,several typical support structure models are built using finite element method.The effects of the outer diameter,thickness of the bar cross section and the axial angle between the bar and the antenna on the natural frequency of support structures are analyzed first.Then the bearing area of the subreflector is optimized using topology optimization technique with natural frequency as constraints and the minimum mass of the bearing area as target.Results indicate that the six-bar model can obtain the highest natural frequency value under the same structural mass.The natural frequency increases with the increase of the axial angle between the bar and antenna first,and then decreases gradually in both the three-bar model and the four-bar model.However,the natural frequency decreases with the increase of the axial angle between the bar and antenna in the six-bar model.The mass of the optimized subreflector is reduced by about 75.28%compared with the initial state.

关 键 词：星载天线 副反射面 支撑结构 结构优化 固有频率 

分 类 号：TN82[电子电信—信息与通信工程]