Coupled dynamic analysis on the drive-off of deepwater platform/riser system
Keywords:deepwater, platform, riser, drive-off, coupled dynamics
In this paper, a coupled dynamic analysis method on the drive-off of deepwater platform/riser system is proposed. The dynamic analysis model of deepwater riser is established in ABAQUS software, and the drive-off dynamic solver of deepwater platform is developed in FORTRAN language. The parameter transfer and iterative calculation between riser analysis model and platform drive-off solver are carried out by ABAQUS subroutine DISP. In an application case, the drive-off dynamics and the coupling effect of deepwater platform and riser system are discussed comprehensively. The results show that the coupling effect between the deepwater platform and riser is obvious. And the response hysteresis effect in bottom of riser during the platform drive-off is found.