Numerical analysis and experimental investigation of modal properties for the gearbox in wind turbine

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• 作者：Pengxing Yi ; Peng Huang ; Tielin Shi
• 关键词：wind turbine gearbox ; modal analysis ; finite element analysis ; modal frequency ; bearing equivalence
• 刊名：Frontiers of Mechanical Engineering
• 出版年：2016
• 出版时间：December 2016
• 年：2016
• 卷：11
• 期：4
• 页码：388-402
• 全文大小：
• 刊物类别：Engineering
• 刊物主题：Mechanical Engineering;
• 出版者：Higher Education Press
• ISSN：2095-0241
• 卷排序：11

文摘

Wind turbine gearbox (WTG), which functions as an accelerator, ensures the performance and service life of wind turbine systems. This paper examines the distinctive modal properties of WTGs through finite element (FE) and experimental modal analyses. The study is performed in two parts. First, a whole system model is developed to investigate the first 10 modal frequencies and mode shapes of WTG using flexible multibody modeling techniques. Given the complex structure and operating conditions of WTG, this study applies spring elements to the model and quantifies how the bearings and gear pair interactions affect the dynamic characteristics of WTGs. Second, the FE modal results are validated through experimental modal analyses of a 1.5 WM WTG using the frequency response function method of single point excitation and multi-point response. The natural frequencies from the FE and experimental modal analyses show favorable agreement and reveal that the characteristic frequency of the studied gearbox avoids its eigenfrequency very well.