环形网状天线保形控性设计方法研究

环形网状天线的发展趋势是结构尺寸大、形面精度高，良好的精度保持性与结构稳定性，针对这类服务于特定空间环境且不具主动在轨调整功能的大型结构，在设计与制造阶段就应充分考虑其长期服役期间的形面精度和结构性能。空间服役环境的各类扰动和参数变异情况下的长期服役形面精度保持性和刚度/模态/强度等稳定性研究(保形与控性)是本项目旨在解决的关键问题。拟开展主要研究内容为：环形桁架-柔性索网的综合找形方法研究；周期性温度变化导致的“形-性”波动研究；材料属性的变异及其对结构的“形-性”影响研究；局部构件失效后“非完整”结构的“形-性”保持性研究；扰动作用下的“形-性”自补偿与结构稳健设计研究。以期在理论研究方面丰富和发展索-梁组合结构分析与建模方法，形成面向航天结构保形控性的稳健设计方法；在应用方面为全生命周期内环形网状天线反射面精度保持性与结构稳定性提供研究手段与技术保障。

Large aperture size, high surface accuracy , good accuracy & structural stability are the future trends of the ring truss mesh antennas. These large structures work in complex space environments and do not have the ability of automatic adjustment. Therefore, their surface accuracy and structural stability on orbit should be fully considered in the design and manufacturing stages. Counting the various disturbances and parameter variations in space service environments, the key tasks of this proposal are to investigate the long term surface accuracy and the structural stability including the stiffness, frequency, strength, etc. The main research contents are listed as follows: comprehensive form finding methodology of ring truss and flexible cable nets; fluctuation of surface accuracy & structural performance caused by periodical temperature changes; fluctuation of surface accuracy & structural performance caused by variations of material properties and individual component failures; self-compensation and structural robust design. The above researches aim at the development of analytical and modeling methodology for cable-beam coupling structures, as well as the surface & structure robust design theory for space antennas. In terms of application, the outcomes of this research proposal can provide guideline and technical support for the guarantee of full life cycle surface accuracy & structural performance stability.