一种新型赋形索网天线的力学特性分析

Analysis of Mechanical Properties of a New Shaped Cable Net Antenna

为了研究重力对新型三层赋形索网反射器型面精度、模态等的影响,对该型面天线在重力环境下反射面朝上和反射面朝下两种工况进行了系统仿真,得到了固有特性和型面精度的变化规律。结果表明,在重力环境下,赋形网状天线节点发生变化,对型面精度影响很大;天线固有特性和重力无关;索网预张力对基频影响可忽略,但对高价模态频率有较大影响。研究成果可为新型赋形索网天线的工程化研制和预估天线在无重力环境下的力学特性提供参考。

In order to study the effect of gravity on the surface accuracy and modal of a new type of a three-layer shapedmesh reflector,the simulation was carried out with the reflecting surface facing upward and downward in the gravity environ-ment. Got the changing rule of the inherent features and surface accuracy,the results show that the nodes of shaped cable netantenna changed has a great influence on the surface accuracy under the gravity environment.The intrinsic characteristic ofthe antenna is independent of the gravity.The pretension has little effect on the fundamental frequency,but has an impact onthe high frequency. The research results of this paper can provide reference for the engineering development of the newshaped cable net antenna and the prediction of the mechanical characteristics of the antenna in the non-gravity environment.