Lamb Wave Arrival Time Extraction Using Hilbert-Huang Transform for Improved Tomography Image |
| |
| Authors: | ZHANG Hai-yan SUN Xiu-li FAN Shi-xuan |
| |
| Institution: | Key Laboratory of Specialty Fiber Optics and Optical Access Networks,School of Communication and Information Engineering, Shanghai University, Shanghai 200072, China |
| |
| Abstract: | Travel time Lamb wave tomography has been shown to be an effective nondestructive evaluation (NDE) technique for plate-like structures.The methods used previously to extract arrival times of the fastest or multi Lamb wave modes are mostly based on various time-frequency methods such as Wigner-Ville distribution,short-time Fourier transform,and recently explored wavelet transform(WT).Frankly speaking,uses of these signal processing methods improve the accuracy of the arrival time extraction to a great extent... |
| |
| Keywords: | Lamb waves tomography Hilbert-Huang transform nondestructive evaluation |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
