Vibration and Damping Analysis of Composite Fiber Reinforced Wind Blade with Viscoelastic Damping Control
Vibration and Damping Analysis of Composite Fiber Reinforced Wind Blade with Viscoelastic Damping Control
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DOI：
10.1155/2015/146949
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发表时间：
2015-07
影响因子：
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通讯作者：
T. Cheng;Ming Ren;Zhen-Zhe Li;Yun-de Shen
中科院分区：
文献类型：
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作者：
T. Cheng;Ming Ren;Zhen-Zhe Li;Yun-de Shen
复合材料由于具有高的强度重量比和刚度重量比等上级力学性能而越来越多地用于风力叶片中。本文对纤维增强复合材料风力机涡轮机叶片进行了粘弹性阻尼处理，并对其振动和阻尼特性进行了分析。采用基于全层位移理论的有限元方法，分析了复合材料壳体结构的阻尼、固有频率和模态损耗因子。在数学建模中考虑了叠层角的影响。该模型准确地考虑了弯曲几何、横向剪切和法向应变的影响，能够描述层合板的锯齿形面内和离面位移。计算了复合材料曲壳结构和风力机叶片的频率响应函数。结果表明，粘弹性层的阻尼比对复合材料结构强度的确定非常敏感。研究了阻尼层厚度变化时的频率响应函数。计算了复合材料纤维增强风力机叶片的固有频率、模态损耗因子和振型。
Composite materials are increasingly used in wind blade because of their superior mechanical properties such as high strength-to-weight and stiffness-to-weight ratio. This paper presents vibration and damping analysis of fiberreinforced composite wind turbine blade with viscoelastic damping treatment. The finite element method based on full layerwise displacement theory was employed to analyze the damping, natural frequency, and modal loss factor of composite shell structure. The lamination angle was considered in mathematical modeling. The curved geometry, transverse shear, and normal strains were exactly considered in present layerwise shell model, which can depict the zig-zag in-plane and out-of-plane displacements. The frequency response functions of curved composite shell structure and wind blade were calculated. The results show that the damping ratio of viscoelastic layer is found to be very sensitive to determination of magnitude of composite structures. The frequency response functions with variety of thickness of damping layer were investigated. Moreover, the natural frequency, modal loss factor, and mode shapes of composite fiber reinforced wind blade with viscoelastic damping control were calculated.