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为揭示风电机组预弯叶片的设计机理,实现多变量优化设计,对不同预弯起始位置和预弯量的2 MW风电机组叶片进行有限元分析.通过NuMAD进行风电机组叶片建模,借助ANSYS Mechanical APDL软件对预弯叶片进行分析.预弯叶片最大Tsai-Wu强度因子随叶片预弯起始位置的增加而减小,随着叶片预弯量的增加而增加;叶片伸长量随叶片预弯起始位置、预弯量的增加而增加;预弯叶片合成位移量随预弯起始位置的增加而增大,随着弯量的增加而减小.叶片预弯起始位置在0.31R～0.52R范围内,预弯量在1.6～2.0 m之间较合理.“,”In order to reveal the design mechanism of pre-bending blade for wind turbine generation system (WTGS) and achieve the multivariable optimization design,the finite element analysis of different pre-bending initial positions and pre-bending values of 2 MW wind turbine blade was carried out.Modeling of wind turbine blade was carried out by NuMAD,and ANSYS Mechanical APDL software was used to analyze the pre-bending blade.The maximum value of Tsai-Wu intensity factor of the pre-bending blade decreases with the increase of the pre-bending initial position and increases with the increase of the pre-bending value.The blade elongation grows as the pre-bending initial position and pre-bending value increase.The pre-bending blade composite displacement increases with the increase of the prebending initial position and decreases with the increase of the pre-bending value.Therefore,setting pre-bending initial position range from 0.31R to 0.52R and pre-bending value from 1.6 to 2.0 meters is more reasonable.