摘要
由于采用双环可展桁架结构可以有效改善结构刚度,实现更大的天线口径,故在已有双环可展桁架结构基础上,基于柔性张力索网成型原理设计可展天线反射面柔性张力索网,利用有限元数值分析方法对两种索网进行找形分析。制作2m口径双环可展桁架结构模型。在双环可展桁架结构模型上安装柔性张力索网,通过对拉索施加预应力将索网张拉成型。运用非接触测量系统对成形后索网节点坐标进行测量,将测量所得结果与数值分析所得结果进行比较分析,考察了柔性张力索网的型面精度。结果表明该张力索网可实现张紧成型,索网节点坐标测试值与设计值较为吻合,可为此类可展天线的设计提供参考。
Bi-Hoop Circular Deployable Truss( BCDT) can improve the stiffness of the deployable truss and is suitable for large scale deployable antenna system. In this paper,flexible tensile cable network was designed for BCDT to support the metal reflector of the deployable antenna. Form finding analysis was conducted with the finite element method. A 2-metre diameter BCDT model was manufactured and assembled,serving as the boundary of the flexible tensile cable network. The flexible tensile cable network was also fabricated and installed on the BCDT model. The surface of cable net was measured by non-contact photogrammetry method. The measured coordinates of the cable net model were close to those of the design. The feasibility of the BCDT and cable net was verified.
出处
《载人航天》
CSCD
2016年第1期99-103,共5页
Manned Spaceflight
基金
载人航天预先研究项目(030103)
关键词
可展结构
双环可展桁架
找形分析
柔性张力索网
非接触摄影测量
deployable structure
Bi-Hoop circular deployable truss
form finding analysis
flexible tensile cable network
non-contact photogrammetry
