Hyperboloidal cooling tower

A dynamic statistical approach is used to predict dynamic stresses in a hyperboloidal cooling tower due to earthquakes. It is shown that the configuration associated with one circumferential wave is the only one which is excitable by earthquake force and that the first mode of such configuration is dominant. An equivalent static load is calculated on this basis. Numerical data presented give coefficients for equivalent static loads, natural frequencies of cooling towers, and static stresses for a seismic load. 21 refs, cited. 

The equilibrium equations of a hyperboloid of revolution used for cooling towers derived by using membrane theory under an arbitrary static normal load are reduced to a single partial differential equation with constant coefficients. The problem of finding displacements is reduced to a similar type of equation so that the solution for this problem becomes straightforward. 11 refs, cited. 

AIF.2 Cooling Tower and Cable net Tower shell Shapes for Nuclear Power Stations Hyperboloid of Revolution... 

Two types of hyperboloid of revolution i.e. a natural, draught cooling tower cable net tower shells - will be discussed below. 

Stress resultants when cooling towers have top and bottom radii that are equally bounded by a smooth hyperboloid. The hyerbola is rotated by the z axis... 

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