大型环形桁架天线柔性包带展开动力学仿真与实验研究  

Simulation and experiment research on flexible belt deployment dynamics of a large hoop truss antenna

作　　者：万小平[1] 杨军刚[1] 宋燕平[1] 马小飞[1] 胡建峰[1] 赵将[1] 

机构地区：[1]中国空间技术研究院西安分院,西安710100

出　　处：《中国科学：物理学、力学、天文学》2017年第10期33-40,共8页Scientia Sinica Physica,Mechanica & Astronomica

基　　金：国家自然科学基金(编号:11290154;11402196;U1537213)资助项目

摘　　要：柔性包带作为一种大型环形桁架天线的关键部件,解锁释放后的展开动力学行为对大型可展开天线的可靠展开具有重要影响.包带展开过程呈现大位移、大转动、大变形的特点,属典型的柔性体几何非线性范畴,其展开动力学行为异常复杂.文中基于10 m级大型可展开天线的柔性包带特性与功能要求,采用几何精确法建立了柔性包带的展开动力学数值分析模型,通过研究识别了影响展开动力学特性的关键参数,开展了常温及高低温下的展开试验验证,试验与数值分析结果相符。The flexible belt is a critical component of the large hoop truss antenna,it decides whether the antenna can deploy successfully or not.When the antenna is stowed,it holds down and makes the antenna in a bundle.It releases before the antenna deployment in orbit.The dynamic behaviors of it have very important effect to the reliable deployment of the large deployable antenna,it is necessary and urgent to study its dynamic behaviors detaily.When flexible belt releases,its dynamic behaviors of large displacements,large rotations,and large deformations are shown during the deployment.These behaviors which belong to typically geometrically nonliear behaviors of flexible bodies are very complex,it is very difficult to perform the numerical analysis using commercial softwares,and it becomes a hot spot of the dynamic research.According to the characteristics and function of the flexible belt which is adopted in a large deployable antenna,we establised the numerical analysis model of the flexible belt by the house software that will be presented in the following paragraghs,in the house software,the geometrically exact method is used.During searching of the dynamic behaviors,a lot of factors are concerned,such as composite belts,mechnisms,damper equipments and so on.By the researching,the critical parameters which affect the dynamic characteristics are recognied,some optimized designs are performed,we developed a new flexilble belt.The verfied experiments are performed in different conditions which include the ambient,hot and cold temperatures.The results of the experiments show a good agreements which is compared to the numerical analysis results.

关 键 词：大型环形桁架展开天线 柔性包带 展开动力学 几何精确梁 

分 类 号：TN820[电子电信—信息与通信工程]