Abstract
AbstractThe 2D aerodynamic modelling of long-span suspension bridges is considered. We use thin airfoil theory from the aircraft industry and a sectional bridge model with an integrated controllable trailing-edge flap. The relatively less well known aerodynamic properties of leading-edge flap will be studied in detail. The optimal approximation of the classical Theodorsen circulation function will be studied as part of the bridge sectional model building exercise, which can therefore be re-casted in a form suitable for control systems analysis and design. The critical wind speeds for flutter and torsional divergence are predicted precisely. Static winglets are shown to be relatively ineffective to mitigate torsional divergence.
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