Motion-induced wind forces of a slender prism

![CDATA[The motion-induced wind forces of a slender prism were investigated using a forced vibration technique. The prism was driven to oscillate by an actuator in cross-wind direction and the unsteady distributed pressures, under different wind velocities and oscillations, were measured. The unsteady generalized and local aerodynamic force coefficients and the motion-correlated force coefficients of the prism, which are functions of reduced wind velocity and oscillation, were analyzed. It shows that the effects of structural motion on the unsteady force coefficients are significant in the cross-wind direction while the effects are slight in the along-wind direction. Furthermore, in the cross-wind direction, the coefficients tend to increase with oscillating amplitudes at low wind speeds while they are at a quasi-steady state at high wind speeds. The study advances the understanding of the effect of structural motion on three-dimensional prisms, which can be utilized to improve response predictions of the prisms.]]