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Application of Morlet wavelet in the stress-time history editing of horizontal axis wind turbine blades

机译:MERLET小波在水平轴风力涡轮机叶片的应力 - 时历史编辑中的应用

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This article presents a novel method in extracting fatigue damage from the stress-time history of the horizontal axis wind turbine blades. A novel method based on wavelet transform (WT) is proposed to shorten the length of the stress-time history. Based on Morlet wavelet (Morl), WT is taken to the stress-time history to generate a plot of accumulative power spectral density (AccPSD) distribution with time. The variation of fatigue damage with AccPSD levels is studied to determine the cutoff level which is controlled by the differences in the global signal statistics (mean stress, root-mean-square and kurtosis).
机译:本文提出了一种新的方法,用于提取水平轴风力涡轮机叶片的应力时间历史中的疲劳损坏。提出了一种基于小波变换(WT)的新方法来缩短应力时间历史的长度。基于Morlet小波(Morl),WT被带到应力时历史,以产生随时间的累积功率谱密度(ACCPSD)分布的曲线图。研究了与ACCPSD水平的疲劳损伤的变化,以确定由全局信号统计(平均压力,根均匀 - 方形和Kurtosis)的差异控制的截止水平。

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