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首页> 外文期刊>Journal of teoretical and applied mechanics >NUMERICAL AND EXPERIMENTAL ANALYSIS OF A SEGMENTED WIND TURBINE BLADE UNDER ASSEMBLING LOAD EFFECTS
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NUMERICAL AND EXPERIMENTAL ANALYSIS OF A SEGMENTED WIND TURBINE BLADE UNDER ASSEMBLING LOAD EFFECTS

机译：分段载荷作用下分段风轮机叶片的数值和实验分析

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摘要

In this paper, numerical and experimental modal analysis of a segmented wind turbine blade assembled with a steel threaded shaft and a nut are presented. The blade segments are built by a 3D printer using ABS material. The experimental modal parameters identification has been achieved using the Eigen system Realization Algorithm (ERA) method for different values of the blade segments assembly force caused by the nut tightening torque. Furthermore, a three dimensional finite element model has been built using DTK18 three node triangular shell elements in order to model the blade and the threaded shaft structure, taking into account the additional stiffness caused by the nut tightening torque. This study covers the blade segments assembly force effects on the rotating blade vibration characteristics. The numerical model is adjusted and validated by the identified experimental results. This work highlights the significant variation of the natural frequencies of the segmented wind turbine blade by the assembling load of the segments versus blade rotating speed.
机译：在本文中，对装有钢制螺纹轴和螺母的分段式风力涡轮机叶片进行了数值和实验模态分析。刀片段由3D打印机使用ABS材料制成。实验模态参数识别已使用本征系统实现算法（ERA）方法实现，以针对由螺母拧紧扭矩引起的叶片节段装配力的不同值。此外，已经使用DTK18三节点三角壳单元建立了三维有限元模型，以便对叶片和螺纹轴结构进行建模，同时考虑到由螺母拧紧扭矩引起的额外刚度。这项研究涵盖了叶片节段组装力对旋转叶片振动特性的影响。通过确定的实验结果对数值模型进行调整和验证。这项工作通过分段的组装负载与叶片转速的关系突出了分段式风力涡轮机叶片的固有频率的显着变化。

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