叶片质量不平衡下风机基础的疲劳性能OA北大核心CSTPCD

In order to explore the fatigue performance of the wind turbine foundation with embedded-ring when the blade mass is imbalanced,the additional load is derived by reconstructing the blade mass imbalance model of the wind turbine,a single-point simulation of the pulsating wind velocity spectrum is done based on the harmonic synthesis method theory to calculate the basic operating load such as the aerodynamic load of the wind turbine,the finite element model of the wind turbine blade-tower-foundation integration is established with the actual engineering as an example,and the structural self-resonance characteristics and the load response under the combined action of the basic operating load and the additional load are calculated.The results show that the deepening of the imbalanced quality of the wind turbine blades will lead to the intensification of the stress concentration phenomenon and the increase of the stress amplitude of the basic structure,which in turn will affect the fatigue performance and fatigue life of the structure.and the force characteristics of the concrete in the structure will be greatly affected,followed by the steel cage,and the foundation embedded-ring is the smallest.