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对一个可展桁架式抛物面天线,利用有限元法,将可展支撑桁架划分为一维辐射-导热杆单元,将反射面划分为二维辐射-导热三角形膜单元,以此模型,计算和分析可展桁架天线在空间环境中的温度场和热变形,得到了可展桁架天线温度场和热变形特点,以及可展支撑桁架对天线整体温度场和热变形的影响.
For a deployable truss parabolic antenna, using the finite element method, the expandable supporting truss is divided into a one-dimensional radiating-conducting rod unit, and the reflecting surface is divided into two-dimensional radiating-thermal conducting triangular membrane units. Based on this model, calculation and analysis The temperature field and the thermal deformation of the deployable truss antenna in the space environment are obtained. The temperature field and the thermal deformation of the deployable truss antenna are obtained, and the influence of the expandable supporting truss on the overall temperature field and the thermal deformation of the antenna is obtained.