风电叶片叶根瓦模具的复合材料固化变形研究

STUDY ON COMPOSITE MATERIAL CURING DEFORMATION OF ROOT TILE MOULD OF WIND POWER BLADE

建立了风电叶片叶根瓦模具的复合材料热传导-化学模型和粘弹性本构模型,对其固化变形进行了有限元模拟,并通过光纤光栅传感器的监测结果验证了模拟结果的可靠性。结果表明延长高温下的恒温时间可以有效提高树脂的固化反应程度,而改变升温速率和低温下的保温时间对固化度的提高效果不明显;叶根瓦模具的复合材料最大变形位于法兰边缘,导致法兰平整度差,因而减小法兰的变形是控制叶根瓦模具制造精度的关键,建议设计刚性约束来减小变形。

The heat transfer-chemical reaction model and viscoelastic constitutive model of root tile mould of wind power blade are established to study the curing deformation of its composite material,and the reliability of the simulation results is verified by the monitoring results of fiber Bragg grating sensors.The research results show that extending the constant temperature time at high temperature can effectively improve the degree of curing reaction of the resin,but the effect of changing the heating rate and the constant time at low temperature on the degree of curing reaction is not obvious.The maximum axial deformation is at the flange edge,the flatness of the flange is not enough,therefore reducing the deformation of the flange is critical to control the manufacturing precision of the root tile mold.And its deformation is mainly determined by the geometry,size and layup sequence of the root tile mold.It is recommended to design rigid constraints to reduce the deformation.