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Application of wavelet energy spectrum in railway track detection
Author(s): 
Pages: 605-612
Year: Issue:  4
Journal: Journal of Vibration Engineering

Keyword:  track irregularitycontinuous wavelet transformenergy spectrumaxle-box accelerationtrack disease;
Abstract: 列车振动能量突变是判断轨道病害及状态恶化的重要依据之一.基于连续小波变换细致的时间-尺度网格划分性能,结合概率方法,通过对轨道不平顺和列车振动信号的能量计算与分析,建立列车振动响应和轨道不平顺信号的时间、尺度和时间-尺度小波能量谱,并进行联合诊断.通过沪宁客运专线和朔黄重载铁路的轨检数据分析,表明此方法能够有效提取轨道结构中微弱病害的类型、损伤程度和空间位置,并实现整体不平顺状态的评估.这为铁路轨道病害诊断和状态评价提供了新的技术途径.
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