Response of Hyperbolic Cooling Towers to Turbulent Wind

by Mahmoud G. Hashish, Asst. Prof.; Fac. of Engrs., Ain Shams Univ., Egypt,
Salman H. Abu-Sitta, (M.ASCE), Assoc. Prof.; Fac. of Engrg. Sci., Univ. of Western Ontario, London, ON, Canada,

Serial Information: Journal of the Structural Division, 1974, Vol. 100, Issue 5, Pg. 1037-1051

Document Type: Journal Paper


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.

Subject Headings: Resonance | Cooling towers | Wind engineering | Wind forces | Wind pressure | Wind speed | Dynamic response | High-rise buildings

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