Load Analysis For Wind Turbine Hub And Tower

According to the momentum-element theory,the thesis aimed at designing on aerodynamic shapes of 1.5MW wind turbine blades, calculating the diameter of 1.5MW wind turbine blades, the aerodynamic parameters of chord length of each section, inflow angle, axial induction, circum induction factor, lift and drag, etc. In the rated, cut-out and limit wind speed, the distinct load value of 1.5MW wind turbine was obtained through calculation and taken as the calculating basis for the load of wind turbine hub and tower.Under the three-dimensional geometry, hub of 1.5MW wind turbine was established model and analyzed in static ANSYS. The result showed hub was content with the usage requirement at limit wind speed and offered the information of load situation and dangerous section which supplied the basis for design and improvement.There were three different models of tower had established when the tower of 1.5MW wind turbine was analyzed. Under the three models, it was that static load was analyzed in detail using ANSYS and the maximum stress of three different tower models, displacement and the distribution of stress on different positions was compared. Meanwhile, the tower model analysis was not only carried out but also obtained the mode shape and characteristic frequency which had been analyzed. Through the optimization design of finite element software, the thickness of tower was optimized and the validity of optimized result was verified. Therefore, the purpose of reducing weight and cost was reached.