0
  • DE
  • EN
  • FR
  • International Database and Gallery of Structures

Advertisement

Vibration-based breathing crack identification using non-linear intermodulation components under noisy environment

Author(s):

Medium: journal article
Language(s): English
Published in: Structural Health Monitoring, , n. 1, v. 19
Page(s): 86-104
DOI: 10.1177/1475921719836953
Abstract:

Structural damages can result in non-linear dynamical signatures such as lower and higher order harmonics and signal modulation that can significantly enhance their detection. The conventional spectral analysis is used in most existing vibration-based damage diagnostic techniques to extract these damage-sensitive non-linear features. However, the major limitation of using spectral analysis is that the amplitudes of non-linear harmonics are highly sensitive to measurement noise and may mislead the damage diagnostic process. Keeping this in view, we present a new reference_free damage diagnostic technique for fatigue-breathing crack detection, localization and characterization using the cyclic spectral analysis-based technique. A new damage index based on spectral correlation exploiting the non-linear intermodulation in the response is proposed. The proposed cyclic spectral analysis-based diagnostics are highly immune to the measurement noise. Numerical and experimental simulation studies have been carried out by considering a beam with single and multiple breathing cracks, to test and verify the robustness and effectiveness of the proposed technique.

Structurae cannot make the full text of this publication available at this time. The full text can be accessed through the publisher via the DOI: 10.1177/1475921719836953.
  • About this
    data sheet
  • Reference-ID
    10562279
  • Published on:
    11/02/2021
  • Last updated on:
    19/02/2021
 
Structurae cooperates with
International Association for Bridge and Structural Engineering (IABSE)
e-mosty Magazine
e-BrIM Magazine