A Study on the Behavior of Ultrasonic Guided Wave Mode in a Pipe Using Comb Transducer
- 1. Seoul National University of Technology, Seoul (Korea, Republic of)
- 2. Pusan National University, Busan (Korea, Republic of)
- 3. Korea Electric Power Research Institute, Daejeon (Korea, Republic of)
Description
A preliminary study of the behavior of ultrasonic guided wave mode in a pipe using a comb transducer for maintenance inspection of power plant facilities has been verified experimentally. The mode identification has been carried out in a pipe using the time-frequency analysis methods such as the wavelet transform(WT) and the short time Fourier transform (STFT), compared with theoretically calculated group velocity dispersion curves for longitudinal and flexural modes. The results are in good agreement with analytical predictions and show the effectiveness of using the time-frequency analysis method to identify the individual modes. It was found out that the longitudinal mode(0,1) is less affected by mode conversion compared with the other modes. Therefore, L(0,1) is selected as an optimal mode for the evaluation of the surface defect in a pipe
Additional details
Publishing Information
- Journal Title
- Journal of the Korean Society for Nondestructive Testing
- Journal Volume
- 24
- Journal Issue
- 2
- Series
- 17 refs, 11 figs, 1 tab
- Journal Page Range
- p. 142-150
- ISSN
- 1225-7842
INIS
- Country of Publication
- Korea, Republic of
- Country of Input or Organization
- Korea, Republic of
- INIS RN
- 42048806
- Subject category
- S42: ENGINEERING;
- Descriptors DEI
- INSPECTION; PIPES; POWER PLANTS; TRANSDUCERS; ULTRASONIC WAVES; WAVEGUIDES
- Descriptors DEC
- SOUND WAVES; TUBES