Wind Induced Vibration Analysis of a 50 Meter Scaled Model of Large Radio Telescope
Wei Qiang, Qiu Yuanying, Duan Baoyan
(School of Mechanical and Electronic Engineering, Xidian University, Xi'an, 710071)

Abstract: A downward cable system for structural control is design to control wind-induced vibration for the next generation large radio telescope. The wind induced vibration of a 50 meter scaled model of the telescope is analyzed. Initial static reference posture and initial stresses are determined by nonlinear static analysis. Random wind forces acted on the cables, and the cabin are simulated based on the characters of the structure. Then the control effect of the downward cable system to structural vibration is analyzed in time region . Meanwhile the frequency response figure of a special node of the cabin is drawn through FFT transformation, which describes the control effect further. 
Keywords: large radio telescope, suspended feed cabin structure, nonlinear analysis, optimization, wind-induced vibration.