기계시스템 : 풍력발전기의 풍하중특성에 관한 연구

Wind load characteristics is investigated for vibration analysis of wind turbine gearbox. A normal wind model assumed, of which the wind velocity is increased according to the height from ground. A blast wind model is assumed, of which the maximum velocity is located at the center and the velocity profile is normally distributed. The periodical torque and bending moments transmitted to the main shaft of wind turbine are investigated. The average values and the harmonic terms of the transmitted moments are studied on the wind direction of range -45˚~45˚ and the bending moment characteristics are examined, which is regarded as the main source of the misalignment of gear train.