Design And Analysis On The Large Radio Telescope With Flexible Cable Structure

A large diameter radio telescope which be put forward by the National Astronomical Observatories Chaines Academy of Sciences is designed with the demand of radio astronomical observation. It is applied to get the slim information from faraway universe and discover the very important information of universe formed. The main technology demand is to reduce the cost of the radio telescope with the satisfaction of electronic performance.The task of this thesis is to design a new single offset paraboloidal antenna with the above demands. And a corresponding parametric finite element model is developed using program design language. Three antennas with different diameters are analyzed utilizing finite element method.This thesis builds an analysis model of antenna according to its actually structure and work characteristic. Given the cable initial stress nonlinear static analysis of antenna structure is done. The dynamic analysis of antenna structural is a main research content of this thesis. The factors influencing inherent natural virbration characteristic are found by doing the mode analysis. The effect of random wind load applied on the structure is simulated and calculated. And random wind vibration response of the structure is studied deeply.The wind resistibility of antenna structure is found to be relatively poor based on the simulation analysis. According to the characteristic of low order vibration, the antenna structure is reasonably improved. The analysis result of random wind vibration response of the modified structure shows that the wind resistibility of structure has been obviously improved.The finite element model of FAST based on ADINA software is changed to be an ANSYS finite element model. The result of static analysis and mode analysis compared with former analysis result shows the transformed finite element model was correct. All of the thesis will provide a useful pre-researchful groundwork platform for the future study job of FAST.