摘要
针对高频段大型反射面天线对电性能的高要求,必须降低太阳热辐射对天线的影响。先计算一天中太阳入射角度的变化规律,再基于I-DEAS软件仿真,得到一天中各时刻天线反射面上的温度、热应力场、热变形分布,然后针对阴影对天线结构的重要影响,以"分点分段"的形式给出不同时刻温度在反射面上的分布及其影响程度和规律,为工程人员进行天线的温度补偿和结构优化提供了依据。
Reducing the effect of solar heat radiation on large reflector antennas is one of the important means to achieve high requirements for the electrical properties of the antennas with high operating frequency. By calculating the variation of solar incidence angles in a day, the temperature distribution, thermal stress field and thermal distortion of the reflector surface at each moment are obtained based on I-DEAS. In view of the important influence of the shadow on the structure of antennas, the impacts and rules of the temperature distribution at each moment on reflector are presented in the form of time-sharing-partitioning, which can help the engineers implement the temperature compensation and structural optimization of antennas.
出处
《宇航学报》
EI
CAS
CSCD
北大核心
2013年第11期1523-1528,共6页
Journal of Astronautics
基金
国家自然科学基金项目(51035006
51205301
50805111)
新世纪优秀人才支持计划(NCET-09-0633)
高等学校博士学科点专项科研基金(20120203110012)
中央高校基本科研业务费专项资金(K50510040001
K5051304009
72103389)
关键词
抛物面天线
太阳热辐射
温度分布
热分析
表面变形
Reflector antennas
Solar heat radiation
Temperature distribution
Thermal analysis
Surface distortion
