Thermal Response Analysis of Flexible Connecting Structure of Large Mesh Antenna

大型网状天线柔性连接结构热响应分析

China Academic of Space Technology, Beijing 100094, China

Received: 11 October 2017

Abstract

The thermal uniformity of large mesh antennas in orbit is influenced by the thermal encironment, which results in thermal deformation and affects the performance of the antenna.Therefore, it is the basis of improving antenna performance to accuratey predict the temperature and analyze the influence facors of the thermal stability of the antenna.In this paper, a large mesh antenna model is constructed by using the FEM analysis software to simulate the thermal response of the flexible connecting structure of the metal mesh reflector, tension cable and rib component.The analysis results show that the temperature of antenna metal mesh and rib components are sensitive to the connection of the two, and their connection to tension rope is not sensitive. The tension cable is sensitive to the connection of the metal mesh and is insensitive to the connection of the rib components. The above analysis can provide an important reference for the design of large mesh antenna connection structure.

摘要

大型网状天线在轨运行的交变热环境影响其温度均匀性，导致热变形，进而影响天线性能，因此准确预计天线在轨温度并分析天线热稳定性的影响因素是改善天线性能的基础。利用有限元热分析软件构建大型网状天线模型，仿真得到金属网反射面、张力绳索、肋组件等柔性连接结构对其连接关系的热响应。分析结果表明天线金属网及肋组件温度均对两者的连接关系敏感，各自对其与张力绳索的连接关系均不敏感；张力绳索对其与金属网的连接关系敏感，对其与肋组件连接关系不敏感。上述分析结论可为大型网状天线连接结构设计提供重要参考。