Paper Title:
Crack Identification by Jointly Time-Frequency Analysis
  Abstract

A novel approach for crack identification based on jointly time-frequency analysis is presented in the paper. A bilinear stiffness model for the breathing crack was introduced to represent the nonlinear dynamics of a cracked beam. The nonlinearity of the dynamic responses due to the crack opening-closing is used to identify the occurrence of the crack. The Wigner-Wille distribution technique is applied to analyze the response signals and the instantaneous frequency is extracted as damage-sensitive feature. The numerical simulations of a breathing crack model were carried out to validate the possibility and effectiveness of the proposed approach. The effects of crack severity and sampling frequency on crack identification were also studied in the simulations respectively. The results show that the proposed method can effectively identify the crack with slight severity without any baseline model or data, and the better the identification obtains as the larger the sampling frequency. The study demonstrates that the proposed approach by using of jointly time-frequency analysis is a promising technique for crack identification.

  Info
Periodical
Key Engineering Materials (Volumes 324-325)
Edited by
M.H. Aliabadi, Qingfen Li, Li Li and F.-G. Buchholz
Pages
161-164
DOI
10.4028/www.scientific.net/KEM.324-325.161
Citation
X. Feng, J. Zhou, "Crack Identification by Jointly Time-Frequency Analysis", Key Engineering Materials, Vols. 324-325, pp. 161-164, 2006
Online since
November 2006
Authors
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Slawomir Banaszek
Abstract:The paper presents the course and results of crack propagation simulation research. The object taken into account is a large power turbo-set...
337
Authors: Wei Wei Zhang, Zhi Hua Wang, Hong Wei Ma
Abstract:The objective of this study is to show the potential of the crack detection method based on Wavelet Packet Transform (WPT), which is...
285
Authors: F. Ricci, F. Franco, Nicola Montefusco
Abstract:In this paper, the mechanisms of propagation of the damage in aluminum panels repaired with bonded composite patches of different mechanical...
597
Authors: Zhi Ping Yin, Jiong Zhang, Jin Guo, Qi Qing Huang
Abstract:The finite element software ANSYS was employed to create a finite element model of the cracked wing beam integrated structure, and the stress...
101
Authors: Fu Ze Xu, Xue Jun Li, Guang Bin Wang, Da Lian Yang
Chapter 8: Fault Diagnosis and Signal Processing
Abstract:It is common for the imbalance-crack coupling fault in rotating machinery, while the crack information is often overshadowed by unbalanced...
675