Hydrodynamic Performance Analysis of New Mini Tension Leg Platform

摘要

With growing development of deepwater oil and gas exploitation, newconcept of platform appears continuously due to disadvantage oftraditional TLP such as large displacement, serious coupling motionsand tension legs' obvious spring-ringing motion. Therefore, aiming atnew mini TLP with cylindrical hull and one or four column, this paperfocuses on comparatively studying the hydrodynamic performance ofthem considering combined action of wind, wave and current.Nonlinear coupling analysis method based on hybrid wave force modelwas adopt in numerical calculation. The computational results showthat 1-column mini TLP reduces yaw response of mini TLP consideringhull-tendion coupling in time domain, while the roll, pitch and heaveresponses are larger than that of 4-column mini TLP, at the same timethe horizontal displacement of 1 column mini TLP can't meetrequirement specification in real ocean environment. Taken as a whole,the 4-column mini TLP has better hydrodynamic performance.