Floating wind turbine platform structure with optimized transfer of wave and wind loads

A floating, semi-submersible wind turbine platform comprising:

• three elongate stabilizing columns, each of the three stabilizing columns having a top end, a keel end, and annular compartments between an outer shell and an inner shaft contained by the column outer shell, each of the three stabilizing columns having a water entrapment plate at its keel end, each water entrapment plate being cantilevered in a plane perpendicular to a longitudinal axis of the stabilizing column;
• three truss members, each truss member including two horizontal main tubular members and two diagonal tubular members, each of the horizontal main tubular members having a first end for connecting to the inner shaft of one of the three stabilizing columns and a second end for connecting to the inner shaft of a different one of the three stabilizing columns such that the interconnected three stabilizing columns and three truss members form a triangular cross-section in a plane perpendicular to the longitudinal axes of the three stabilizing columns, where the three sides of the triangular cross-section are the three truss members and the three vertices of the triangular cross-section are the three stabilizing columns, and for each truss member, the two diagonal tubular members each having a first end and a second end where the first end of each diagonal tubular member is connected to the inner shaft of one stabilizing column and the second end of each diagonal tubular member is connected to one of the horizontal tubular members in the same truss member;
• and
• an elongate wind turbine tower disposed over the top end of one of the three stabilizing columns such that the longitudinal axis of the tower is substantially parallel to the longitudinal axis of the stabilizing column.