数据采集与处理2017，Vol.32Issue(2)：286-292,7.DOI:10.16337/j.1004-9037.2017.02.008
高分辨率超声Lamb波频散曲线测量与板厚估计
High-Resolution Ultrasonic Lamb Waves Dispersion Measurement and Plate Thickness Evaluation
摘要
Abstract
As one of the most promising technologies,ultrasonic Lamb waves have been widely analyzed in the non-destructive evaluation.However,due to the guided dispersion and mode overlap,mode identification and dispersion determination are still challenging,thereby attacting considerable attentions.Here,we use two traditional spectrum estimation methods,i.e.,the Yule-Walker method and the Burg method to analyze the array-transducer signals for high-resolution ultrasonic Lamb waves dispersion measurement.An inverse method was also designed to estimate the aluminum plate thickness from the extracted wideband dispersion curves.Experiments on three aluminate plates with different thicknesses (3 mm,4 mm and 5 mm) demonstrated that the spectrum estimation methods were helpful for the ultrasonic Lamb waves based non-destructive evaluation.关键词
超声Lamb波/经典谱估计法/频散曲线/厚度估计/无损检测Key words
ultrasonic Lamb waves/traditional spectrum estimation methods/dispersion curves/thickness estimation/non-destructive evaluation分类
医药卫生引用本文复制引用
许凯亮,张正罡,刘丹,他得安,胡波..高分辨率超声Lamb波频散曲线测量与板厚估计[J].数据采集与处理,2017,32(2):286-292,7.基金项目
国家自然科学基金(11304043,11327405,11525416)资助项目. （11304043,11327405,11525416）
