Guidelines for Reducing Dynamic Loads in Two-Bladed Teetering-Hub Downwind Wind Turbines

A major goal of the federal Wind Energy Program is the rapid development and validation of structural models to determine loads and response for a wide variety of different wind turbine configurations operating under extreme conditions. Such codes are crucial to the successful design of future advanced wind turbines. In previous papers, we described steps we took to develop a model of atwo-bladed teetering-hub downwind wind turbine using ADAMS (Automatic Dynamic Analysis of Mechanical Systems), as well as comparison of model predictions to test data. In this paper, we show the use of this analytical model to study the influence of various turbine parameters on predicted system loads. We concentrate our study on turbine response in the frequency range of six to ten times therotor rotational frequency (6P to 1 OP). Our goal is to identify the most important parameters which influence the response of this type of machine in this frequency range and give turbine designers some general