Wave Load‐Submarine Pipeline‐Seafloor Interaction

Abstract

Pipeline stresses due to loss of support caused by depressions or scour below submarine pipelines are analyzed. The sea floor on which the pipe is resting is idealized by Winkler medium. Bending in horizontal plane due to hydrodynamic loads is considered in the analysis and theoretical equations and general solutions are presented. Theoretical results for vertical deflections due to loss of support are compared with experimental results, and computer results are presented in nondimensional form for a wide range of parameters. It is concluded that the stresses due to hydrodynamic drag will be affecting the resultant stresses considerably and will need consideration in the analysis. The deflection and moment coefficients are found to be linearly proportional to the load coefficient. An illustrative example has also been worked out to show the use of design charts.