Session: 06-03-03 Fluid-Structure, Multi-body and Wave-body Interaction

Submission Number: 157243

Solitary Wave Propagation Over Partially-Buried Pipes 

This study analyzes the interaction of nonlinear waves with a partially-buried submerged pipe in shallow water. Submerged pipes play a critical role across various industries due to their ability to transport fluids or serve as structural elements underwater. Key applications include water intake and outfall pipelines, subsea oil and gas pipelines, cooling water systems for power plants, and protective conduits for fiber-optic or power cables laid on the seabed, among others. Hydrodynamic loads can displace submerged pipes from their partially-buried positions, causing them to float to equilibrium positions exposed on the seabed. Such displacement leads to structural damage and additional unanticipated dynamics. This study aims to determine the loads induced by nonlinear extreme waves on partially-buried pipes, an issue of increasing importance given climate change effects such as sea level rise and intensified extreme weather events, which result in larger unpredicted loads. The wave-induced horizontal and vertical forces and overturning moments on partially-buried pipes are determined by use of the Level I Green-Naghdi (GN) theory. The GN equations, which satisfy exactly the nonlinear free surface boundary conditions and the body boundary condition, are solved using a finite difference approach. The study considers a range of periodic wave conditions, including varying wave heights and periods, pipe diameters, and submersion depths. Results include wave-induced pressure distributions over the pipe, horizontal and vertical forces, overturning moments, as well as modifications to the wave surface elevation due to the submerged pipe, relevant to breakwater applications. Variations in wave-induced loads with respect to wave and pipe parameters are discussed in detail, offering valuable insights for the design and assessment of submerged pipelines under extreme conditions.

Presenting Author: Masoud Hayatdavoodi University of Dundee

Presenting Author Biography: Research Interests:
Water Wave Mechanics
Hydrodynamics
Biological Fluid Mechanics
Naval Architecture
Marine Renewable Energy
Climate Change Impact on Coastal Structures