ULTRASONIC LAMB WAVES APPLIED IN NONDESTRACTIVE DAMAGE EVALUATION
Among nondestructive damage testing (NDT) and structural health monitoring (SHM) techniques, the Lamb wave based methods have shown great potential for fast damage detection in plate-like structures.In order to develop Lamb waves based NDE methods, we firstly study the signal processing methods to find a good time-frequency representation (TFR) for Lamb waves.Then, a multistage damage detection method without baseline is proposed for accurate damage detection.The method utilizes the same PZT configuration and data processing techniques in all stages and results from previous stages contribute to the improvement of damage detection in next stages.
Lamb wave Structural health monitoring Ultrasonic technique Continuous wavelet transform
Zheng LI Jian-lin YI Jian-lin CHEN Saqib HAMEED
Department of Mechanics and Engineering Science, College of Engineering, Peking University, Beijing, 100871, China
国际会议
哈尔滨
英文
33-36
2019-01-11（万方平台首次上网日期，不代表论文的发表时间）