Analytical determination of the orthotropic material behavior of stator bars in the range of the end windings and determination of the material characteristics of the orthotropic composite space brackets via experimental modal analysis and FE- calculation
Analytical determination of the orthotropic material behavior of stator bars in the range of the end windings and determination of the material characteristics of the orthotropic composite space brackets via experimental modal analysis and FE- calculation
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DOI：
10.1049/cp.2012.0283
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发表时间：
2012-03
期刊：
影响因子：
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通讯作者：
B. Schlegl;F. Schonleitner;A. Marn;F. Neumayer;F. Heitmeir
中科院分区：
文献类型：
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作者：
B. Schlegl;F. Schonleitner;A. Marn;F. Neumayer;F. Heitmeir
发电机的端部绕组在电磁力的作用下会受到振动的激励，这会造成严重的损坏(特别是在谐振的情况下)和噪声。为了避免这种情况，在设计过程中，用有限元预测端部绕组的固有频率和振型是很重要的。因此，一个完整的定子线棒的材料模型是必要的。本文介绍了这样一种材料模型的发展。定子线棒的复合结构相当复杂，不可能提供特征值的快速计算。这就是使用合适的、均匀的、基于几何的实体模型的原因。对正交各向异性复合材料空间支架的材料特性进行了实验测定。根据测量结果对数值结果进行了评估。对本征值、杨氏模数和剪切模数进行了实验研究。
The end windings of generators are excited to vibrations due to electromagnetic forces which can cause severe damage (especially in case of resonance) and noise. To avoid this, it is important to predict the natural frequencies and modes of the end windings with finite elements during the design process. Hence, a material model of the complete stator bar is necessary. This paper shows the development of such a material model. The composite structure of a stator bar is quite complex and makes it impossible to provide a quick calculation of the eigenvalues. That's the reason for using a suitable, homogeneously, geometry based solid model. Special attention was paid to the experimental determination of the material characteristics of the orthotropic composite space brackets. The numerical results have been evaluated against measurements. Eigenvalues, Young's modulus, and shear modulus have been experimentally investigated.