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Dynamic Analysis of Wind Turbine Blade Based on Reverse Engineering

机译:基于逆向工程的风力涡轮机叶片动态分析

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The dynamic analysis of the 750Kw wind turbine blade was presented based on Reverse Engineering. Because of complex shape, the model of wind turbine blade is a bottleneck of restriction development on the dynamic characteristic research of blade. The work attempted a new way to build the blade 3D model and completed the dynamic analysis. At first, the point cloud data of blade were gained using ATOS optical scanner. Secondly simplified, smoothed and partitioned in Imageware, point cloudy data were created into curves. Then the curves were imported into UG, the 3D model of blade was attained through curve fitting. At last the dynamic analysis of the blade was completed in ANSYS Workbench. The analysis adopted BlockLanczos method to extract the mode and get the natural frequency and eigenmode from the first to sixth modes. The paper ascertained the first and second wave eigenmodes, the first swing and the first torsion eigenmode. Calculations showed that eigenvalue of wave vibration and swing vibration were lower, torsion vibration eigenvalue was higher. In the vibration of the blade, the couple vibration of wave and swing taked major role, and the influences of torsional vibration were not great. The results showed the wave and swing vibration were predominated, the torsional vibration can be neglectful. The paper developed some new methods, established foundations for the further research of large wind turbine blade in the future.
机译:基于逆向工程,提出了750kW风力涡轮机叶片的动态分析。由于复杂的形状,风力涡轮机叶片模型是对叶片动态特征研究的限制性发展的瓶颈。该工作试图建立刀片3D模型的新方法并完成动态分析。首先,使用ATOS光学扫描仪获得刀片的点云数据。其次简化,平滑和分区在图像软件中,将点多云数据创建到曲线中。然后将曲线导入UG,通过曲线配件实现刀片的3D模型。最后,刀片的动态分析在ANSYS工作台完成。分析采用了BlockLanczoS方法来提取模式并从第一至第六模式获取自然频率和特征模型。该纸张确定了第一和第二波的尖端模码,第一摆动和第一扭转特征模。计算表明,波振振动和摆动振动的特征值较低,扭转振动特征值较高。在刀片的振动中,波浪的夫妇振动和摆动的主要作用,扭转振动的影响并不大。结果表明波浪和摆动振动占主导地位,扭转振动可以忽略。本文开发了一些新方法,建立了未来大型风力涡轮机叶片进一步研究的基础。

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