Three-Dimensional Flow Response Analysis of Subsea Riser Transporting Deep Ocean Water

摘要

This study presents a 3-dimensional flow-structure interaction analysis of subsea risers in water flows.Two structural connectors (flat and circular couplers) were intentionally devised and numerically tested using ANSYS CFX to investigate how these couplers behave under the water flows.In the flow analysis,the water field was constructed with an inlet,outlet,and symmetric boundary conditions.As a result,the responses (drag coefficients and pressure fields) were obtained and the pressure fields were applied for the structural analysis.Finally,the structural responses (displacements and equivalent stresses) of the risers were measured to demonstrate the efficiency of the riser connectors.