On the design of the tower for gas ducts thermal power plants
The issues of designing various metal towers necessary for maintaining gas ducts are considered. It was revealed that the tetrahedral tower with four gas removal shafts most fully meets the requirements of thermal power plants. A number of advantages of the adopted design solution meeting the production requirements are described, one of which is the key - the boiler connection is carried out to separate gas ducts, which allow providing convenience of maintenance and repair of the high-rise structure. Based on a brief overview, the objectives of the study were determined - to establish the influence of various profiles on the forces in the elements and to select the most optimal profile for elements of a metal tower with gas ducts. Calculations of the load-bearing structures of the metal tetrahedral tower for the specified loads and impacts were made using the method of finite elements implemented in the LIRA-CAD software complex. The analysis of the presented histograms convincingly showed that the tubular cross section takes a leading position in the forces in the tower elements on the effect of its own weight and wind load. It is reasonably shown that when exposed to wind load, both static and dynamic, the tubular profile is most advantageous, since it has the least forces and moments. It was revealed that at load from own weight, all profiles for belts at the considered elevation have small moment values. The article concludes that the comparative calculation and its analysis showed the influence of the type of profiles on the forces, on the bearing capacity of the metal tower. And a tubular cross section is the most optimal profile for elements of a tower structure with four gas ducts.