Studies on Wavelet Packet-Based Crack Detection for a Beam under the Moving Load

Wei Wei Zhang; Zhi Hua Wang; Hong Wei Ma

doi:10.4028/www.scientific.net/KEM.413-414.285

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HomeKey Engineering MaterialsKey Engineering Materials Vols. 413-414Studies on Wavelet Packet-Based Crack Detection...

Studies on Wavelet Packet-Based Crack Detection for a Beam under the Moving Load

Abstract:

The objective of this study is to show the potential of the crack detection method based on Wavelet Packet Transform (WPT), which is depending on the response at a single point on a beam subject to moving load. In this paper, an ANSYS model of a cracked beam is established. The moving load is transient analyzed by shifting the point of the concentrated force. The response at mid-span of the beam is calculated and wavelet packet transformed. The crack on the beam can be found by the abnormal signal in WPT branches. The size is also estimated by a defined damage index (Dindex) which relates to the energy of the abnormal signal. Finally, the effects of both crack location and wavelet selection on Dindex are discussed in detail.

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Periodical:

Key Engineering Materials (Volumes 413-414)

Pages:

285-290

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.413-414.285

Citation:

Cite this paper

Online since:

June 2009

Authors:

Wei Wei Zhang, Zhi Hua Wang, Hong Wei Ma

Keywords:

Beam, Crack, Damage Detection, Wavelet Packet (WP)

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