风力发电机复合材料叶片老化性能研究

Study on Aging Performance of Composite Blade for Wind Turbine

研究风力发电机环氧树脂-玻璃纤维复合材料叶片的老化过程,使用有限元分析法对不同外部环境条件扰动下的老化过程进行分析,以提出风力机叶片抗老化对策。影响环氧树脂-玻璃纤维复合材料结构风力机叶片寿命的因素,包括其本身转速带来的自重压弯、风力喘振谐振等引起的结构疲劳,该过程可能造成其内部节理发育,加速其老化过程,影响其寿命。也与风力机叶片的运行环境温度有关,如高温带来的材料分解、低温带来的材料化学键释放、温差带来的内部热胀度变化引起的节理发育等。可以通过优化材料分子力学复合结构、对叶片进行主动温控、选择抗老化表面涂层等对策进行风力机叶片抗老化处理。

The aging process of wind turbine epoxy resin glass fiber composite blade was studied.The aging process under different external environmental conditions was analyzed by finite element analysis method,and the anti-aging countermeasures of wind turbine blades were put forward.The factors that affect the life of wind turbine blade of epoxy resin glass fiber composite structure include the structural fatigue caused by dead weight bending and wind surge resonance caused by its own rotating speed.This process may cause the development of internal joints,accelerate its aging process and affect its life.It is also related to the operating environment temperature of wind turbine blade,such as material decomposition caused by high temperature,release of chemical bond of material caused by low temperature,joint development caused by internal thermal expansion due to temperature difference,etc.The anti-aging treatment of wind turbine blades can be carried out by optimizing material molecular mechanics composite structure,active temperature control of blades,selection of anti-aging surface coating and other countermeasures.