Buckling of vertical rod loaded by dead weight and tensile force subjected to its top end (applied to marine vertical oil pipelines—Risers)

Abstract

The problem of buckling of a vertical rod loaded by dead weight and tensile force to its top end was examined. Four variants for attachment of the top end of the rod upon clamping the bottom end were analyzed. The problem was solved by individual consideration of the stretched and compressed zones of the rod and their sewing together. Critical values of the axial force were obtained, which permit prevention of buckling of a long rod by the action of dead weight. Analysis permits selection of the required tension of vertical pipelines for deep-water oil drilling and demonstration of the advantages of using composites (especially, carbon-fiber-reinforced plastics) as materials for manufacture of the elements of such structures.