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

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Abstract

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.

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Authors and Affiliations

  1. School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China

    Pengxing Yi, Peng Huang & Tielin Shi

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  1. Pengxing Yi
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  2. Peng Huang
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  3. Tielin Shi
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Correspondence to Pengxing Yi.

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Yi, P., Huang, P. & Shi, T. Numerical analysis and experimental investigation of modal properties for the gearbox in wind turbine. Front. Mech. Eng. 11, 388–402 (2016). https://doi.org/10.1007/s11465-016-0404-z

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  • DOI: https://doi.org/10.1007/s11465-016-0404-z

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