Response of hyperbolic cooling towers to turbulent wind

TLDR: In this article, a general procedure to predict the dynamic response, including resonance of hyperbolic cooling towers to turbulent winds, was presented. But the authors did not consider the effect of the windward and wake regions.

Abstract: The paper outlines a general procedure to predict the dynamic response, including resonance of hyperbolic cooling towers to turbulent winds. Pressure spectra on the tower surface were measured in a boundary layer wind tunnel. Simplifying assumptions have led to the description of pressure spectra and response spectra by means of compact formulation. Application to full-scale towers, including Ferrybridge, is examined. It is concluded that the windward and wake regions are not correlated; the quasi-steady response resides mainly in the coupled harmonics m=1, 2, 3; and the resonant response resides mainly in the harmonics m=4, 5, 6. It is also concluded that while the quasi-steady response increases as wind velocity squared, the resonant response increases faster than wind velocity cubed.