Russian Federation
from 01.01.2000 to 01.01.2022
Sankt-Peterburg, Russian Federation
Objective: to identify the most efficient types of cylindrical cross-sections in accordance with the criterion of minimizing the wind effect on an element by studying the graph of aerodynamic coefficients for elements of this cross-section type presented in the current regulatory documentation, taking into account the accepted parameters of surface roughness, wind pressure values, and a set of heights relative to the ground surface. Application of the research results to existing types of cylindrical cross-sections manufactured in accordance with GOST. Methods: analysis of the existing scientific and technical literature touching upon the issue of experimental studies of the aerodynamic indicators of cylindrical cross-sections. Consideration of analytical expressions for calculating the wind effect on cylindrical cross- sections with their subsequent transformation to obtain intermediate values. Approximation of the curve of the graph of aerodynamic coefficients. Results: a technique has been developed for identifying the ranges of diameters of cylindrical cross-sections located in the critical region of Reynolds numbers. A formula for determining the aerodynamic coeffi in the critical Reynolds number region was obtained by approximating the curve of the graph of aerodynamic coeffi located on the boundary of the critical and postcritical Reynolds number regions. The diff between the wind eff on various pipe diameters was identifi and the resulting graph illustrates a reduction in wind eff on larger-diameter pipes. The diff with wind eff on smaller-diameter pipes can reach 16%. Practical signifi : the possibility of using the derived method to obtain the most rational sections with a cylindrical surface shape based on the parameter of the least wind impact on the element, taking into account the accepted values of surface roughness and wind pressure, as well as the set of heights relative to the ground surface. The method allows for the development of more rational and cost-eff lattice structures for tower structures by reducing the wind impact on individual elements.
tower, round element, cylindrical section, wind effect, aerodynamic coefficient, optimal pipe sections, load, lattice elements, Reynolds number
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