Abstract: The dynamic differential equations for suspended cabin-cable structure of the large radio telescope are given, with the similarity conditions between the distorted model and the prototype obtained from the equations. Furthermore some typical scale factors such as the frequency scale factor, wind velocity scale factor, an mass scale factor are described by the known geometrical scale factors utilizing the essential dynamic similarity conditions. Based on the similarity analysis and the vibration experiments on the model, the natural frequencies and amplitude of wind-induced vibration of the prototype are predicted. Comparing the predictions with the dynamic simulation made by the nonlinear finite element method, consistent results are demonstrated adequately.

Key words: large radio telescope, suspended cable-cabin structure, distorted model