Research on Analysis and Numerical Simulation of Wind-Load on Observatory Antenna

For large observatory antenna working in the open air, wind-load is the primary disturbance which should be considered because it not only influences the structure strength of the antenna, but also causes distorts of emitting area and the back-frame, which influences the antenna’s precision seriously and creates focal diverge. In order to analyze the effects of the wind-load on the antenna, a dynamic model is presented based on the computational wind engineering, which is deduced with the relation between wind speed and wind-load torques acting on the azimuth and elevation axis, through coordinate transformation. Finally, a numerical simulation analyzing of the effects of wind-load on the antenna is carried out using MATLAB, which reveals the variety law of wind-load under a typical trajectory of antenna.