The following information was submitted:
Transactions: INTERNATIONAL JOURNAL of MECHANICS
Transactions ID Number: 19-719
Full Name: Ruichong Zhang
Position: Associate Professor
Age: ON
Sex: Male
Address: Division of Engineering, Colorado School of Mines, Golden, Colorado 80401
Country: UNITED STATES
Tel:
Tel prefix:
Fax:
E-mail address: rzhang@mines.edu
Other E-mails:
Title of the Paper: impact-echo nondestructive testing and evaluation with hilbert-huang transform
Authors as they appear in the Paper: Ruichong Zhang and Abdennour C. Seibi
Email addresses of all the authors:
Number of paper pages: 8
Abstract: This study proposes the implementation of Hilbert-Huang transform (HHT) time-frequency analysis in impact-echo (IE) testing for improved accuracy in integrity appraisal and damage diagnosis of infrastructure systems. In particular, this paper first reviews the fundamental of IE non-destructive testing and evaluation, i.e., formula of thickness estimation which is based on one-dimensional wave propagation and dependent upon the selected longitudinal wave speed of the materials under test, resonance frequency identified with fast Fourier transform (FFT) of IE recordings, and a shape-based correction factor. While this study details multiple causes of the distorted thickness estimation with the formula from the mechanics point of view, FFT-based analysis is among the most important factors. A time-frequency HHT analysis is then introduced to overcome the shortage of FFT analysis in identifying the resonant frequency from noise-added IE recordings. With FFT and HHT!
analyses of five data sets of sample IE recordings from sound and damaged concrete structures and comparison with referenced ones, this study reveals that the proposed IE approach with HHT analysis not only eliminates the subjective use of correction factor in the formula, it also improves greatly the accuracy in the thickness estimation.
Keywords: Impact-echo, Wave propagation, Non-destructive testing and evaluation, Hilbert-huang transform
EXTENSION of the file: .pdf
Special (Invited) Session: improved impact-echo approach for non-destructive testing and evaluation
Organizer of the Session: 638-386
How Did you learn about congress:
IP ADDRESS: 138.67.40.236
