A
0模态Lamb波具有波长短、检测灵敏度高等特点,可在板结构中实现大范围、高效率的损伤检测和监测。设计并制作了一种指向性的A
0模态电磁声传感器,其由印制于柔性电路板上的回折线圈和马蹄形磁铁组成。试验验证了所设计的传感器可在铝板中有效地激励出单一的A
0模态。为了实现铝板中缺陷的检测与重构,提出了一种基于EMAT(电磁声传感器)的Lamb波扫描成像技术,对铝板中不同形状的预制模拟缺陷进行扫描检测。对各扫描路径下检测信号的直达波进行虚拟时间反转计算,提取不同路径下的损伤指数,并结合损伤概率成像算法和数据融合方法,实现了预制模拟缺陷的定位和重构,成像结果与缺陷实际位置和形状非常吻合。
所属栏目
科研成果与学术交流国家重点研发计划(2018YFF0214701)
收稿日期
2018/7/19
作者单位
胡亚男:中国特种设备检测研究院, 北京 100013
赵娜:北京工业大学 机械工程与应用电子技术学院, 北京 100124
张旭:中国特种设备检测研究院, 北京 100013
史一生:中国特种设备检测研究院, 北京 100013
丁克勤:中国特种设备检测研究院, 北京 100013
联系人作者
丁克勤(kqding@sina.com)
备注
胡亚男(1988-),男,工程师,主要从事特种设备安全、结构健康监测、无损检测新技术、新方法的研发工作
引用该论文:
HU Yanan,ZHAO Na,ZHANG Xu,SHI Yisheng,DING Keqin.Scanning Imaging of Aluminum Plate Using Electromagnetic Acoustic Lamb Waves Based on Probabilistic Damage Algorithm[J].Nondestructive Testing,2019,41(2):1~7
胡亚男,赵娜,张旭,史一生,丁克勤.基于概率损伤算法的铝板电磁超声Lamb波扫描成像[J].无损检测,2019,41(2):1~7
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