500m口径球面射电望远镜馈源刚性悬挂平台结构方案

Structural Scheme of the Stiff Suspension Platform for Supporting the Feed Cabin of the 500 m Aperture Spherical Radio Telescope

为将来在中国建筑世界上最大的射电望远镜 (FAST) ,提出了一种馈源刚性悬挂平台结构方案 .它借鉴了美国已建成的Arecibo望远镜馈源支撑“固定平台”结构方案 ,并作了显著的改进 ,以满足馈源舱在半径为 15 9.9m、开口直径 2 77m的球冠上方便、连续移动的功能要求 .分析与设计结果表明 ,这种悬挂平台具有足够大的空间整体刚度 。

A structural scheme of the stiff suspension platform for supporting the feed cabin of the FAST, which will be built in China and will become the largest radio telescope in the world, is presented in this paper. It is adapted from the structural scheme of the “fixed platform” for supporting the feed cabin of the Arecibo Radio Telescope built in the USA and is improved remarkably to meet the function requirement that the feed cabin should be moved conveniently and smoothly on the spherical cap with radius of 159.9 m and aperture diameter of 277 m. The analysis and design results indicate that the spatial stiffness of the suspension platform is large enough to meet the location precision requirement of the feed focus.