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Dynamic Analysis of Wind Turbine Blade Based on Reverse Engineering

机译：基于逆向工程的风机叶片动力学分析

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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：基于逆向工程对750Kw风力发电机叶片进行了动力学分析。由于形状复杂，风力发电机叶片的模型成为制约叶片动态特性研究的瓶颈。这项工作尝试了一种新的方式来构建刀片3D模型并完成了动态分析。首先，使用ATOS光学扫描仪获取叶片的点云数据。其次，在Imageware中对其进行简化，平滑和分区，然后将点混浊数据创建为曲线。然后将曲线导入到UG中，通过曲线拟合获得叶片的3D模型。最后，在ANSYS Workbench中完成了刀片的动态分析。分析采用BlockLanczos方法提取模式，并从第一到第六模式获得固有频率和本征模式。论文确定了第一和第二波本征模，第一摆动和第一扭转本征模。计算结果表明，波浪振动和摆动振动的特征值较低，扭转振动的特征值较高。在叶片的振动中，波动和摆动的耦合振动起主要作用，并且扭转振动的影响不大。结果表明，波动和摆幅振动占主导地位，扭转振动可以忽略不计。本文提出了一些新方法，为今后进一步研究大型风力发电机叶片奠定了基础。

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