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Develop a frequency–wavenumber analysis and decomposition approach to isolate individual wave modes from complex multimodal Lamb wave signals in thin-walled structures.

February 17, 2014Journal of Intelligent Material Systems and Structures

Lamb wave frequency–wavenumber analysis and decomposition

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Authors

ZTZhenhua TianQingdao University LYLingyu YuUniversity of South Carolina

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Implication

Experimental study demonstrates frequency–wavenumber decomposition of multimodal Lamb waves in thin-walled structures, enabling single-mode damage detection in structural health monitoring.

Key Points

Develop a frequency–wavenumber analysis and decomposition approach to isolate individual wave modes from complex multimodal Lamb wave signals in thin-walled structures.
Applied multidimensional Fourier transforms to project multimodal Lamb wave propagation into the frequency–wavenumber domain for mode separation and filtering.
Developed a novel wavenumber analysis technique to retain localized temporal and spatial information typically lost during Fourier transformation.
Conducted experimental validation using a scanning laser Doppler vibrometer to record high spatial resolution wavefield measurements.
Distinguished distinct multimodal Lamb wave propagation paths running at varying velocities directly in the frequency–wavenumber domain.
Successfully extracted targeted single-mode Lamb waves via domain-specific filtering to facilitate isolated damage interrogation.
Preserved critical spatial and temporal wave characteristics through the proposed wavenumber analysis methodology.

Cite This Study

Tian et al. (2014) studied this question.

synapsesocial.com/papers/6a9aebf60ebe8f912f374d12 https://doi.org/10.1177/1045389x14521875

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Implication

Experimental study demonstrates frequency–wavenumber decomposition of multimodal Lamb waves in thin-walled structures, enabling single-mode damage detection in structural health monitoring.

Lamb wave frequency–wavenumber analysis and decomposition

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Implication

Key Points

Cite This Study

Lamb wave frequency–wavenumber analysis and decomposition

Discussion

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Implication

Key Points

Cite This Study

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