Similarity Parameter Analysis of Aeroelastic Model for Nonlinear Saddle Tensioned Membrane Structure

Abstract:

Based on the rigid model tunnel test and nonlinear wind induced response calculation method, the vibration frequencies of initial form finding state and static equilibrium state, the upward and downward maximum displacement responses under wind load of two saddle tensioned membrane structures are analyzed to study the simplification of similarity parameters. According to the results, it is proposed that, for the tensioned membrane structures without diagonal height difference, similarity requirement of Froude number should be less than λ2V/λL=10/4; for those with diagonal height difference, similarity requirement of Froude number should be less than λ2V/λL=20/4; the quality coefficient should be controlled in the range of 0.8~1.2; and the elastic modulus coefficient should be in the range of 0.5~1.5.

Key words:tensioned membrane structure; aeroelasticity; wind tunnel test; similarity parameter; nonlinearity