This work is based on the design of a wind turbine with vertical axis, having the rotor with two stages, each with 3 straight blades, placed at an angle of 120 deg between them, the two stages being offset by 60 deg angles. The construction solution of the blades is of the sandwich type, with a thin sheet (aluminum alloy) coating and the core made of foam. After determining the loads on the blades (forces and moments) for the operating critical structural stress cases, a structural analysis is performed. The stress analysis is performed using the software NX 7.5.3.1, the module "ADVANCED SIMULATION".

The structural analysis consists mainly of checking the structural strength of the main components of the VAWT and the supporting tower.

The maximum deflection at the top of the tower, for critical wind conditions, is maximum 64 mm, which suggests sufficient rigidity of the construction. The analysis of the results shows that the structural elements of the turbine resist to the critical stresses. The rotor structure is stable from the point of view of vibration modes.

The next step of the research is that of structural optimization, combined with appropriate control methods.