Utilization of Wavelet Packet Transform for Identification of Location and Depth of Crack in Arced Beam Using Finite Elements Method

Lotfollahi Yaghin, Mohammad Ali; Koohdarag, Mahdi

Utilization of Wavelet Packet Transform for Identification of Location and Depth of Crack in Arced Beam Using Finite Elements Method

Authors

Mohammad Ali Lotfollahi Yaghin

Mahdi Koohdarag

Abstract

Many of the structural fractures are happen as the result of ruptures of the constituent materials. The beginning of these ruptures coincides with the cracks and causes serious threats to the structure’s behavior. Therefore, many studies have been carried out on methods of identification and indication of the cracks. In this article, at first the dynamic transient analysis is performed with finite element software (ANSYS) on the structure. Then acceleration time history have been decomposed to the component of wavelet packet using software (MATLAB), then the energy rate index are calculated for each of signals, which illustrated with WPERI. The results show that these Indexes are sensitive and exact indicators for identification of crack.

Keywords

Crack Identification

dynamic analysis

Energy Rate Index

Signals Processing

Wavelet Packet