Taking the rotor of an 1 .5 MW horizontal-axis wind turbine as investigation object and consid-ering the interaction effect of rotational aerodynamic force with the structure of the rotor,the force on the rotor due to the interaction of rotor’s rotational aerodynamic force with its structure is calculated with fi-nite element analysis software ANSYS Workbench in the case of different wind speeds and the static analy-sis of the rotor structure is carried out with this force as an input load,so that the aerodynamic modality of the rotor is further analyzed under condition of the prestress.The results show that the maximum deform-ation will be at the tip of the rotor blade and an obvious stress concentration will occur at three-quadrant blade from its root and just at the root during wind turbine operation The maximum stress will increase with wind velocity before rated wind speed and then remain almost unchanged.The maximum blade de-formation will increase with wind velocity.The rotating effect will make the frequency of each modality of wind turbine increased.%以某 1 .5 MW水平轴风力机风轮为研究对象,考虑风轮旋转气动力和结构的流固耦合效应,运用 ANSYS Workbench有限元分析软件,计算出不同风速时风轮旋转气动力与结构流固耦合作用下的压力.将压力作为输入载荷对风轮结构进行静力学分析,进而转换为预应力条件下的模态分析.结果表明:风力机运行时,叶尖处的变形最大,叶片上距离叶根 3/4 段处和叶根部有明显的应力集中;最大应力在额定风速以前随着风速的增大而增大,额定风速以后变化较小;叶片最大变形量随着风速的增大而增大;旋转效应使得风轮各阶模态所对应的频率增大.
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