Aerodynamic Parameters of Tensioned Membrane Structure Based on Aeroelastic Wind Tunnel Test

Abstract:

Based on the aerodynamic wind tunnel test of two saddle tensioned membrane structures, the modal parameters were identified from free responses and responses under wind loading, the using Ibrahim time domain and stochastic subspace identification methods. Besides, the variation of aerodynamic mass and damping with wind direction, wind speed, and pretension were researched, and reasons for the difference between previous research achievements were analyzed by comparison. The results show that the aerodynamic mass changes with the wind direction, reaches the maximum under oblique wind direction, increases with the wind speed increment, and decreases with the pretension increment. In addition, the damping ratio of first order modal increases with the increase of wind speed.