A Few Comments on Determining the Shapes of Hyperboloid Cooling Towers by the Means of Ambient Tangents Method
Streszczenie
Almost 80 cooling towers operating in Poland are subject to periodical measurements
on the current basis. Due to the technical condition of the cooling towers, operating for more
than 20 years, the problematics of determining the shape of shell structures is still timely, in
spite of the fact that the methods of measurements and determining the shape of shell structures
are commonly known. A significant number of measurements are continued to be performed
by the means of the ambient tangents method [2, 3]. Although this method is being
phased out from the market and replaced with the spatial incision method, polar line method,
observations with use of the GPS receivers and photogrammetry methods, the economic
reasons cause the observations by the means of the ambient tangents method to be stili
applied by a significant number of contractors. This induces the Authors to present the possibilities
of improving this method and to show that the modification of calculations allows
improving the accuracy of the results obtained. The detailed algorithm describing the new
method of determining the so-called "tangent length"1) awaits printing in [5]. This paper
presents the results of calculations of the model structure in order to illustrate the differences
between the classical and modified approach.
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