The Research Of The Design Method Against Fatigue For The Mechanical Components In Wind Turbines

With the wind turbine becoming large, the fatigue problem of the components in wind turbines is increasedly important . In order to reduce the cost and decrease the weight, improve the reliability of the wind turbine,it is necessary to design the components in wind turbines with anti-fatigue method. So, Based on the aerodynamics,the method for predicting fatigue life,fatigue damage cumulative rule and the finite element method, set pridicting fatigue life of the wind turbine as objective, this thesis analyzed and researched how to establish the model for calculating the fatigue load of the components in wind turbines ; researched the key factors that effect the components fatigue life; and studied the method for pridicting fatigue life of the components in wind turbines;gave a method that fit for cumulating the fatigue damage like the wind turbine that work under complex conditions.According to this method, this thesis get some results, and verified that it is right.