Implementation of bending-torsion coupling in the design of a wind-turbine rotor-blade
Implementation of bending-torsion coupling in the design of a wind-turbine rotor-blade
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DOI：
10.1016/s0306-2619(99)00016-1
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发表时间：
1999-07-01
期刊：
影响因子：
11.2
通讯作者：
Beukers, A
中科院分区：
文献类型：
--
作者：
de Goeij, WC;van Tooren, MJL;Beukers, A
研究了复合材料风力涡轮机转子叶片弯扭耦合被动变桨距控制的实现方法。有限的被动扭转变形是通过等速转子叶片的挥舞弯曲和弹性扭转之间的结构耦合来实现的。用有限元程序分析了叶片和蒙皮层合结构，其中模拟了一个完整的带翼梁腹板的叶片。这种传统的刀片构造具有一些缺点。因此，可供选择的设计概念进行审查，耦合层被限制在一个承载梁，而较软的皮肤提供的空气动力学形状。通过进一步的分析发现，虽然两种备选设计方案绕过了前缘接头处的应力集中，但弯扭耦合响应较低。通过实验验证了计算方法的正确性。实验结果与理论预测有很好的相关性。建议进一步研究具有离轴纤维取向的玻璃/碳混杂FRP的疲劳寿命特性。(C)1999由Elsevier Science Ltd.出版。保留所有权利。
An investigation is performed on the implementation of bending-torsion coupling of a composite wind turbine rotor blade to provide passive pitch-control. Limited passive torsion deformation is realised with a structural coupling between flapwise bending and elastic twist of a constant speed rotor-blade. The blade and skin laminate configuration are analysed with a FEM program, in which a complete blade with spar webs is modelled. This conventional blade configuration has some disadvantages. Therefore alternative design concepts are reviewed, where the coupling plies are restricted to a load-bearing spar, while a softer skin provides for the aerodynamic shape. From additional analysis, it is found that, while for the two alternative design concepts the stress concentrations at the leading edge joint are bypassed, the bending-torsion coupling response is lower. An experiment was performed to validate the calculation methods. The experimental results show good correlation with theoretical predictions. It is recommended to investigate further the fatigue life properties of a glass/carbon hybrid FRP with off-axis fibre orientations. (C) 1999 Published by Elsevier Science Ltd. All rights reserved.