基于匹配追踪的蜂窝夹层复合材料损伤检测

被引：10

作者：

冯勇明 ^{[1
]}

周丽 ^{[1
]}

李真 ^{[2
]}

机构：

[1] 南京航空航天大学航空宇航学院机械结构力学及控制国家重点实验室

[2] 中国商飞上海飞机设计研究院

来源：

仪器仪表学报 | 2012年 / 33卷 / 04期

关键词：

蜂窝夹层复合材料; Chirplet原子; Lamb波; 损伤检测;

D O I：

10.19650/j.cnki.cjsi.2012.04.018

中图分类号：

V229.7 [];

学科分类号：

摘要：

基于Lamb波和匹配追踪时频分析方法,提出一种损伤成像方法,对蜂窝夹层复合材料结构进行损伤监测。首先针对Lamb波传播的特点,提出了匹配追踪方法的快速实现方案,该方法能准确地匹配失真变形的窄带脉冲信号,并识别Lamb波的模态;然后对由压电传感器采集到的Lamb波信号,采用匹配追踪方法提取特征信息,得到Lamb波的能量分布;在此基础上,考虑Lamb波在各向异性结构中传播速度的影响,将损伤处的散射波能量分布和各像素点对比度联系起来,得到损伤图像,将损伤的情况可视化。通过蜂窝夹层复合材料结构实验验证了该方法的可行性和有效性。

引用

页码：836 / 843

页数：8

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