Study on the Vibration Characteristics of Yaw Gear System for Large-Capacity Offshore Wind Turbine

Vibration and noise must be considered to maximize the efficiency of a yaw system reduce fatigue load acting on wind turbine. This study investigated method for analyzing yaw-system vibration based change in load-duration distribution (LDD). A substructure synthesis was combined with planetary gear train rotational model finite element models housing carriers. For excitation sources, mass imbalance, mesh frequency, bearing defect frequency were considered, critical speed analysis performed. The results showed that did not occur within operating range, but occurred first-stage system. It found stiffness first natural increased LDD load. In addition, no range under any loads. Because rolling changed LDD, it necessary consider when turbine vibration.