Lamb波的交叉递归分析在金属板损伤量化中的应用

刘小峰,张天瑀,孙小强,柏林

振动与冲击 ›› 2022, Vol. 41 ›› Issue (22) : 226-232.

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振动与冲击 ›› 2022, Vol. 41 ›› Issue (22) : 226-232.
论文

Lamb波的交叉递归分析在金属板损伤量化中的应用

  • 刘小峰,张天瑀,孙小强 ,柏林
作者信息 +

Application of Lamb wave cross-recurrence analysis in damage quantification of metal plates

  • LIU Xiaofeng,ZHANG Tianyu,SUN Xiaoqiang,BO Lin
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文章历史 +

摘要

针对金属板疲劳损伤演变的非线性动力学特性,提出了基于Lamb波交叉递归分析的疲劳裂纹量化检测方法。该方法首先从结构动力学角度采用交叉递归图分析了损伤信号与无损信号在相空间中的非线性相关性,并在此基础上采用了交叉递归量化分析(Cross-Recurrence Quantification Analysis,CRQA)特征对Lamb波信号中的裂纹损伤进行表征。接着,结合CRQA特征的状态相关性、单调性、鲁棒性及特征间的关联性进行特征的优化选择,采用支持向量描述模型对优选特征进行了融合,构建了金属板疲劳损伤的统一量化指数。最后,采用铝板随机裂纹仿真实验与铝板弯折试验对本文提出方法进行了验证。结果表明,基于Lamb波交叉递归分析的损伤评估方法突破了Lamb波的多模态性、散射性、损伤波包的微弱性造成的损伤特征提取困难的问题,不仅能够对金属板疲劳损伤进行有效的量化评估,还具有较好的噪声鲁棒性,在复杂结构疲劳损伤检测与评估领域具有较好的应用前景。
关键词:Lamb波;疲劳损伤量化分析;特征选择交叉递归量化分析;特征选择;特征融合

Abstract

In view of the nonlinear dynamic characteristics of metal plate in its fatigue damage evolution, a quantitative detection method of fatigue crack is proposed on the basis of cross recursive analysis. From the structural dynamics point of view, the nonlinear correlation of damaged signal and undamaged signal in the reconstructed phase space is described by the cross recursive plot, and the cross recursive quantitative analysis (CRQA) features are extracted to characterize the damage information in the Lamb wave signal. Combined with the state relevance, monotonicity, robustness and correlation between features, the optimal CRQA features are selected. The support vector description model is established to fuse the optimal features, and the unified quantitative index of crack damage is constructed. The results of simulation and bending test show that the proposed method can not only effectively evaluate the fatigue damage of metal plate, but also has good noise robustness. This method breaks through the difficulty of analyzing the damage signal waveform caused by multimode, scattering and weakness of damage wave package. It has a good application prospect in detection and evaluation of fatigue damage in complex structures.
Key words: Lamb waves; Fatigue damage quantification; Cross recurrence quantification analysis;Feature selection;Feature fusion

关键词

Lamb波 / 疲劳损伤量化分析 / 特征选择交叉递归量化分析 / 特征选择 / 特征融合

Key words

Lamb waves / Fatigue damage quantification / Cross recurrence quantification analysis;Feature selection;Feature fusion

引用本文

导出引用
刘小峰,张天瑀,孙小强,柏林. Lamb波的交叉递归分析在金属板损伤量化中的应用[J]. 振动与冲击, 2022, 41(22): 226-232
LIU Xiaofeng,ZHANG Tianyu,SUN Xiaoqiang,BO Lin. Application of Lamb wave cross-recurrence analysis in damage quantification of metal plates[J]. Journal of Vibration and Shock, 2022, 41(22): 226-232

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