Abstract
A procedure has been developed to calculate flat cover facing sheet fixed by electric rivets and welds along its outer and inner contours and loaded with external pressure. The calculation is based on the procedure for calculating key parameters of annular plates clamped along the inner and outer contours. The contours of two adjacent plates lying around the rivets join at a point that is equidistant from the adjacent rivets. Radial and annular stresses in the plates are calculated taking account of the load (design pressure) distributed uniformly over the surface of the plates and of the bending moments obtained from the condition that the angle between the normal and the curved middle surface of the annular plates is zero at the boundary of their joint. The inefficiency of using electric rivets, around which significant radial stresses develop due to their small diameter, is shown. It is recommended that the facing sheet be made in the form of annular plates fixed to the cover by annular welds, which will significantly reduce labor input.
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