空气耦合Lamb波对玻璃纤维复合板的扫查成像研究

复合材料科学与工程 ›› 2020, Vol. 0 ›› Issue (4): 46-52.

空气耦合Lamb波对玻璃纤维复合板的扫查成像研究

常俊杰^1,2,3, 万陶磊^1*, 吴俊¹, 曾雪峰¹

1.南昌航空大学无损检测技术教育部重点实验室,南昌330063;
2.浙江清华长三角研究院,嘉兴3140003;
3.日本探头株式会社,日本横滨232-0033

收稿日期:2019-08-05 出版日期:2020-04-28 发布日期:2020-04-28
通讯作者: 万陶磊(1993-),男,硕士研究生,主要从事超声无损检测方面的研究,354442958@qq.com。
作者简介:常俊杰(1964-),女,博士,副教授,主要从事超声无损检测的应用技术研究及检测设备的研发等方面的工作。本文作者还有李媛媛¹。
基金资助:
国家自然科学基金项目(11464030)

SCANNING AND IMAGING OF GFRP PLATES BY AIR-COUPLED ULTRASONIC LAMB WAVE

CHANG Jun-jie^1,2,3, WAN Tao-lei^1*, WU Jun¹, ZENG Xue-feng¹

1.Key Lab of Nondestructive Testing, Ministry of Education, Nanchang Hangkong University,Nanchang 330063, China;
2.Yangtze Delta Region Institute of Tsinghua University. Zhejiang,Zhejiang 314000, China;
3.Japan Probe Co., Ltd., Japan Yokohama 232-0033, Japan

Received:2019-08-05 Online:2020-04-28 Published:2020-04-28

摘要/Abstract

摘要： 针对空气耦合Lamb波,采用了一种与信号速度无关的概率损伤成像方法,对玻璃纤维复合材料板(Glass Fiber Reinforced Polymer,简称“GFRP”)中存在的不同缺陷进行了成像研究。首先使用空气耦合探头在GFRP板的同侧激励和接收单一模态Lamb波,并将探头沿着两个正交的方向进行扫查。然后使用矩形窗截取每个扫查路径上接收信号的直达Lamb波,并对其进行快速傅里叶变换(FFT)。得到其频域能量后,定义其与参考信号频域能量的相对差异为能量损伤因子。最后将各扫查路径的能量损伤因子结合概率损伤算法,对不同类型的缺陷进行成像,并与空气耦合C扫查成像结果进行对比。实验结果显示,基于空气耦合Lamb波的概率损伤成像方法能够有效地对GFRP板中存在的不同损伤进行定位和定量。

关键词: GFRP, 空耦Lamb波, 损伤因子, 概率成像

Abstract: Aiming at the Air-coupled ultrasonic Lamb wave, a probability imaging method independent of signal velocity was used to study the multiple types of defects in Glass Fiber Reinforced Plate (GFRP). Firstly, the single mode Lamb waves are excited and received on the same side of the GFRP with an air-coupled probe, and the probe is scanned in two orthogonal directions. Then, we intercept the direct defect signal received by each scanning path and carry out Fast Fourier Transform (FFT). After obtaining the energy in the frequency domain, the relative difference between the energy in the frequency domain and the reference signal is defined as the energy damage factor. Finally, the energy damage factors of each scanning path were combined with the probability damage principle to conduct imaging of different types of defects, and the imaging results were compared with the results of air-coupled C-Scan. The results show that the imaging method based on the air-coupled Lamb wave can effectively localize and quantify multiple types of defects in GFRP.

Key words: GFRP, air-couple Lamb wave, damage index, probability imaging

中图分类号:

TB332

常俊杰, 万陶磊, 吴俊, 曾雪峰. 空气耦合Lamb波对玻璃纤维复合板的扫查成像研究[J]. 复合材料科学与工程, 2020, 0(4): 46-52.

CHANG Jun-jie, WAN Tao-lei, WU Jun, ZENG Xue-feng. SCANNING AND IMAGING OF GFRP PLATES BY AIR-COUPLED ULTRASONIC LAMB WAVE[J]. Composites Science and Engineering, 2020, 0(4): 46-52.

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