Stability Analysis of a TLP with Inclined Tension Legs under Different Marine Survival Conditions

Abstract

To verify that inclined tension legs can improve the stability of the tension leg platform, this paper established the dynamic equation of a tension leg platform (TLP) under marine environmental loads by using the modified Morrison equation considering the influence of ocean currents on wave forces. Additionally, the velocity and acceleration of random wave water particles were simulated via the JONSWAP spectrum. In addition, a three-dimensional model of a tension leg platform with inclined tension legs was established by AQWA, and its dynamic responses under variable survival conditions were compared and analyzed. The results showed that the surge and heave were more sensitive to the sea current, while the pitch was more sensitive to the wind. There is a significant difference in tendon tensions between the atypical TLP with inclined tension legs established in this study and the typical International Ship and Offshore Structures Committee (ISSC) TLP.

Hydrodynamic Response and Tension Leg Failure Performance Analysis of Floating Offshore Wind Turbine with Inclined Tension Legs

“…More attention should be paid to the pitch and surge motion of TLP-type FOWT. However, there are seldom studies on the hydrodynamic response and the tension leg failure performance of FOWT with inclined tension legs [34,35]. Therefore, based on the three-dimensional potential flow theory, a hydrodynamic model in deep seawater was established and applied in the hydrodynamic analyses of FOWT with inclined tension legs.…”