Crack Identification of Curved-Elements Using Wavelet Packet

Reza Goldaran; Mehdi Kouhdaragh

doi:10.4028/www.scientific.net/AST.105.144

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HomeAdvances in Science and TechnologyAdvances in Science and Technology Vol. 105Crack Identification of Curved-Elements Using...

Crack Identification of Curved-Elements Using Wavelet Packet

Abstract:

Wavelet Transform (WT) and Wavelet Packet Transform (WPT) approaches have shown great promise in the field of signal analysis in recent decades. The main merit of these methods is their capability in localization of each signal in distinct time or space interval. However, the frequency resolution of such transformation is relatively poor in high frequency regions. The WPT, which is an extended form of the WT, provides a complete level-by-level signal decomposition. Therefore, a frequency analysis creates an arbitrary time. In this study, dynamic transient analysis is performed employing a finite element software (ANSYS) on a beam and acceleration time history of various points is investigated. Then, the captured signals are decomposed to the wavelet packet components using MATLAB and energy rate index is calculated for each component utilizing a wavelet packet rate index (WPERI). The results indicate that not only are the obtained index values sensitive, but they also are precise for the crack identification.

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Periodical:

Advances in Science and Technology (Volume 105)

Pages:

144-150

DOI:

https://doi.org/10.4028/www.scientific.net/AST.105.144

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Online since:

April 2021

Authors:

Reza Goldaran*, Mehdi Kouhdaragh

Keywords:

Crack Identification, Dynamic Analysis, Energy Rate Index, Signal, Wavelet Packet Transform

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