Hydrodynamic Performance Analysis of New Mini Tension Leg Platform

摘要

With growing development of deepwater oil and gas exploitation, new concept of platform appears continuously due to disadvantage of traditional TLP such as large displacement, serious coupling motions and tension legs' obvious spring-ringing motion. Therefore, aiming at new mini TLP with cylindrical hull and one or four column, this paper focuses on comparatively studying the hydrodynamic performance of them considering combined action of wind, wave and current. Nonlinear coupling analysis method based on hybrid wave force model was adopt in numerical calculation. The computational results show that 1-column mini TLP reduces yaw response of mini TLP considering hull-tendion coupling in time domain, while the roll, pitch and heave responses are larger than that of 4-column mini TLP, at the same time the horizontal displacement of 1 column mini TLP can't meet requirement specification in real ocean environment. Taken as a whole, the 4-column mini TLP has better hydrodynamic performance.