On estimating the aerodynamic admittance of bridge sections by a mesh-free vortex method

A stochastic method of generating a synthetic turbulent flow field is
combined with a 2D mesh-free vortex method to simulate the effect of an
oncoming turbulent flow on a bridge deck cross-section within the
atmospheric boundary layer. The mesh-free vortex method is found to be
capable of preserving the a priori specified statistics as well as
anisotropic characteristics of the synthesised turbulent flow field.
From the simulation, the aerodynamic admittance is estimated and the
instantaneous effect of a time varying angle of attack is briefly
investigated. The obtained aerodynamic admittance of four
aerodynamically different bridge sections is compared to available wind
tunnel data, showing good agreement between the two.