流固耦合条件下风力机的叶片应力分析对大型风力机的疲劳破坏分析具有重要意义.本文以1.5 MW风力机叶片作为研究对象,基于计算流体力学(CFD)和Ansys Workbench仿真分析开展风力机叶片气动力性能的流固耦合分析,以风力机叶片空气动力载荷、旋转惯性载荷作为主要载荷与结构变形的流固耦合交界面的载荷数据传递问题.结果表明,从弦长最大处到靠近叶尖1/3位置处,叶片后缘处应力呈增长趋势,在靠近叶根处出现应力集中现象,最大应力达到了5.6 MPa,容易出现裂纹损伤,与风力机现实运行中出现的断裂部位接近.证明本文所采用的分析方法的合理性.%The analysis of wind turbine blade stress under the condition of fluid solid coupling is great siguificance to the analysis of the fatigue failure of large wind turbine.In this paper,1.5 MW wind turbine blade as the research object,carry out simulation analysis coupling dynamic performance in wind turbine gas flow based on computational fluid dynamics (CFD) and Ansys Workbench,and analysis the load data transfer problem between taking aerodynamic load and the rotating inertial load as the main load and the load of fluid solid coupling interface of structural deformation the wind turbine blade.The results show that the stress at the trailing edge of the blade is increasing,from the maximum chord length to near the tip position of 1/3,stress concentration appears at the root of the blade.The maximum stress is 5.6 MPa,and the position is easy to crack damage,which is close to the fracture site in the reality operation of wind turbine.The rationality of the analytical method used in this paper is proved.
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