关键词: 风电机组塔架, 有限元分析, 结构参数优化, 支持向量机, 遗传算法

Abstract:

Structure parameter optimization of wind turbine tower in extreme service environment was carried out  herein.A segmented linear change structure
was employed to describe the tower
wall thickness,and the tower load analysis method was introduced based on blade element momentum(BEM) theory.The related characteristics of tower structure parameters and stress under extreme loads and that of
tower structure parameters and natural frequency were analyzed by using the finite element simulation method.
The SVM  method was used to build a rapid calculation model of tower structure
parameters and stress,and that of tower structure parameters and natural frequency.
Then,the minimum tower mass was selected to be as the optimization goal;the strength,natural frequency and the boundary conditions were selected to be as the constraint conditions;the GA was employed to be as the optimization algorithm.Based on the above proposed optimization method,a 2MW wind turbine tower was optimized and the optimization results show that the tower mass is reduced by 3.5% and the stress curve is smoother.

Key words: wind turbine tower, finite element analysis, structure parameter optimization, support vector machine(SVM), genetic algorithm(GA)