This study aims to propose a numerical simulation method for analyzing the lateral movement of submarine pipelines under wave-current interaction.By establishing a three-dimensional discrete rigid body to simulate the seabed,beam elements to simulate the submarine pipeline,and setting two load steps to simulate the process of pipe-soil contact,the problem of convergence difficulty in solid models is resolved.The influence of different pipe-soil normal behavior contact stiffness,different pipe-soil tangential behavior friction coefficients,different wave-current parameters,and different underwater unit length pipe masses on the lateral movement of submarine pipelines is analyzed.The results show that the maximum equivalent stress,maximum lateral displacement,maximum contact pressure,and maximum lateral friction shear stress of submarine pipeline are not sensitive to the variation of pipe-soil normal behavior contact stiffness.The maximum lateral displacement of the pipeline decreases with the increase of pipe-soil tangential behavior friction coefficient,showing a linear relationship.When the wave height is constant,the maximum lateral displacement of the pipeline increases with the increase of flow velocity,and the smaller the wave height,the faster the increase of maximum lateral displacement with flow velocity.The maximum lateral displacement of the pipeline decreases with the increase of underwater unit length pipe mass,showing a linear relationship.
submarine pipelinewave-current interactionoffshore oil and gaspipe-soil interactionlateral displacement
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