Comparison of BEM and FVM Approaches for Analysis of an Offshore Wind Turbine Installed on TLP in Caspian Sea

Compliant offshore tension leg platforms (TLPs) are adaptive platforms with a vertical mooring system. These types of platforms are usually used in deep water. Adding sufficient initial tension to the mooring will reduce the vertical movements of the structure. This platform includes tendons, body, and deck, in which most hydrodynamic forces are applied to the body. In this work, an investigation is done on a TLP with a wind turbine by numerical analysis. The boundary element and the finite volume method are carried out in this work in the Caspian sea. Then the platform is analyzed at a depth of 150 m, under the influence of wind, current, and irregular waves with one and 100-year return period, and at a zero-degree wave angle. The results of the two numerical approaches are very close and almost identical. The tension leg platform is stable in the different irregular waves. Also the response amplitude operator calculated using two numerical methods agrees satisfactorily.