索膜反射面可展开天线的形态设计  

Form-state Design of Deployable Antenna with Cable Membrane Reflector

作　　者：杜雪林 DU Xuelin(School of Intelligent Manufacturing and Mechanical Engineering,Hunan Institute of Technology,Hengyang 421002,Hu'nan,China)

机构地区：[1]湖南工学院智能制造与机械工程学院,湖南衡阳421002

出　　处：《机械科学与技术》2024年第4期711-720,共10页Mechanical Science and Technology for Aerospace Engineering

基　　金：湖南省自然科学基金面上项目(2021JJ30467,2023JJ50099)。

摘　　要：为研究金属反射网和索网的张紧状态对可展开天线形面精度的影响,考虑支撑桁架变形对索膜反射面可展开天线进行形态设计研究。金属反射网可看作一类薄膜结构,由于金属反射网和索网均需施加预张力来达到一定的刚度,因此首先基于索膜结构力密度方程进行形态设计,使其在自身预张力和外载作用下达到满足要求的形状和精度;索膜结构的张拉作用会导致桁架变形,造成再平衡后索膜反射面形面精度的降低和张力分布不合理,因此,需要建立天线整体的非线性有限元模型;对天线模型进行迭代修正,最后得到满足要求的张力设计变量和天线构型。最后通过相应算例,验证了方法的正确性。In order to study the influence of the tension state of metal reflective net and cable net on the shape accuracy of deployable antenna,the form-state design of deployable antenna with cable membrane reflector is studied considering the deformation of support truss.Metal reflective net can be regarded as a kind of membrane structure,and both metal reflective net and cable net need to apply pretension to achieve a certain stiffness.Therefore,firstly the form-state design is carried out based on the force density equation of cable membrane structure to make it meet the requirement of the shape and accuracy under its own pretension and external load.The tension of cable membrane structure will lead to truss deformation,and after rebalancing,resulting in the reduction of shape accuracy of cable membrane reflector and unreasonable tension distribution.Therefore,it is necessary to establish the nonlinear finite element model for the whole antenna.By iteratively modifying the antenna model,the tension design variables and configuration of deployable antenna are obtained.The present method is programmed for a corresponding example at last,and the results indicate that the method is feasible.

关 键 词：索膜反射面可展开天线 力密度方程 非线性有限元模型 薄膜 形态设计 

分 类 号：V443[航空宇航科学与技术—飞行器设计]