This paper considers the time‐varying loads experienced by wind turbine main bearings. Radial load trajectories based on simulated data indicate that ‘looped’ structures, in the form of repeating changes in radial load magnitudes and directions that form elliptical patterns, are present, which have not been described before in the literature. In order to allow these identified structures to be described and studied, an automated method for identification and parameterisation of these loops is presented, along with preliminary results from applications on simulated data. In order to assess the relative importance and potential impacts of these identified structures on bearing rollers, an internal load model for double‐row spherical roller bearings is also developed. Results indicate that identified loops in radial main bearing applied loads lead to significant fluctuations in bearing roller loads, even within normally unloaded regions. These findings motivate further study with respect to the identified load structures and their impacts on wind turbine main bearing internal loading and failures. The methods developed in this paper provide the basis for a systematic approach and necessary tools for this future work.

中文翻译：

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开发系统的方法来分析风力涡轮机的时变主轴承载荷

本文考虑了风力涡轮机主轴承承受的时变载荷。基于模拟数据的径向载荷轨迹表明，存在“环状”结构，其形式为形成椭圆形图案的径向载荷大小和方向的重复变化，这在文献中没有进行过描述。为了描述和研究这些识别出的结构，提出了一种用于识别和参数化这些回路的自动化方法，以及来自对模拟数据的应用的初步结果。为了评估这些确定的结构对轴承滚子的相对重要性和潜在影响，还开发了双列球面滚子轴承的内部载荷模型。结果表明，即使在正常空载区域内，在径向主轴承施加的载荷中识别出的环圈也会导致轴承滚子载荷的明显波动。这些发现促使人们对确定的载荷结构及其对风力发电机主轴承内部载荷和故障的影响进行进一步研究。本文开发的方法为系统的方法和将来的工作提供了必要的工具。