Evolution analysis of local scour of umbrella suction anchor foundation under stokes wave and current
WANG Qigang
LENG Hao
YU Yaqiong
CAO Tonggang
Abstract：The scour process around submarine pipeline in combined waves and current were experimen-tally investigated.Furthermore,the coupled waves and current-pipeline-fluid numerical model were built by the FLOW-3D software to study the scour and hydrodynamic characteristics around pipeline in combine waves and current.Based on the numerical results,the effects of water depth,pipeline diame-ter,pipeline suspended height on the scour depth were analyzed.The results indicated that the pressure difference between the upstream and downstream sides of the pipeline resulted in piping beneath pipe-line,promoting the tunnel scour,which indicated the onset of scour.There were three vortex system around pipeline in waves,and it accelerated the scour.The scour depth was significantly influenced by the water depth,pipeline diameter,pipeline suspended height.A greater water depth and pipeline sus-pended height resulted in a smaller scour depth.The scour depth increased with the increase of current velocity.
Keywords：submarine pipelinelocal scouringscouring mechanismmaximum scouring depthhydro-dynamic characteristics
Publication Date：2024-10-28
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：9( 64-72 )