Conference proceeding
Novel approximate waveform capacity dimension for damage identification of beam-type structures
Proceedings of SPIE, Vol.6934(1), pp.69340A-69340A-10
Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2008
03/27/2008
Handle:
https://hdl.handle.net/2376/111130
Abstract
Fractal as a novel mathematical tool has a great potential to deal with transit events in a complex waveform. In this paper, fractal is introduced to detect irregularity of vibration mode shapes without using a baseline requirement. Different from the popular Katz's waveform fractal dimension (KWD), a novel approximate waveform capacity dimension (AWCD) specialized in irregularity detection in vibration mode shapes is introduced, from which an AWCD-based modal abnormality algorithm (AWCD-MAA) is established. The fundamental characteristics of AWCD-MAA, such as crack location identification and size quantification, are investigated using an analytical crack model of cantilever beams. An experimental modal shape evaluation of a cracked composite cantilever beam using smart piezoelectric sensors/actuators (i.e., Piezoelectric lead-zirconate-titanate (PZT) and polyvinylidene fluoride (PVDF)) is conducted to confirm the feasibility of the proposed algorithm. The proposed AWCD-MAA is capable of locating and quantifying the crack in a beam-type structure without prior requirement of baseline reference data.
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Details
- Title
- Novel approximate waveform capacity dimension for damage identification of beam-type structures
- Creators
- Pizhong Qiao - Washington State UnivMaosen Cao - Washington State Univ
- Publication Details
- Proceedings of SPIE, Vol.6934(1), pp.69340A-69340A-10
- Conference
- Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2008
- Academic Unit
- Civil and Environmental Engineering, Department of
- Identifiers
- 99900547189201842
- Language
- English
- Resource Type
- Conference proceeding