Improvement of calculated strength indicators of cylindrical shells to reduce the metal consumption of equipment

Abstract

In this paper, we propose a method for calculating cylindrical shells in the area of support devices, based on the assumption that the shell material is ideal rigid-plastic. As a rule, the minimum required thickness of a cylindrical shell is determined when calculating its strength. However, in many cases, for example, design of equipment under internal pressure, the strength calculation does not provide an unambiguous solution, since such a shell can be reinforced with ribs. The more often the ribs are installed, the thinner the shell can be, but in this case, the manufacturability of the design deteriorates. It is known that a thin shell of large diameter is difficult to manufacture: the laboriousness of rolling, assembly, calibration, etc. increases. Thus, a simple method is proposed for determining the bearing capacity of cylindrical shells and plates in the area of support and sling devices, which does not require knowledge of the form of destruction. As can be seen, the produced shells have thicknesses greater than the calculated ones, therefore, the curves constructed according to the formulas can be taken as restrictive dependencies when assigning the minimum required thickness of the cylindrical shell. The use of these methods will reduce the metal consumption of structures. Keywords: cylindrical; shell; thickness; support; shape; deformation.