流固耦合的风力发电机组叶片振动特性分析

摘要

Aiming at analysis of the blade dynamic performance,it sets up the flow model and blade 3D mode of 1.5MW wind driven generator,obtains the models based on fluid-solid coupling.Based on these tenth order model shape and natural frequency for rated rotating speed and static conditions,it conducts the test with hammering method for accuracy verification.The result shows that blade design is reasonable and has a high safety factor and no resonance.%为分析风力发电机组叶片的动力性能和结构稳定性,建立了1.5MW风力机的流场计算域和叶片实体模型.采用流固耦合法对叶片的10阶振型进行了数值计算,得到了额定和静止两种工况下叶片的10阶振型和固有频率值,再以锤击法为试验手段,验证了叶片的强度性能和数值计算精度.结果表明,该叶片设计合理,具有较高的安全系数和稳定性,运行中不会发生共振.