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Leveraging modal orthogonality, the normal mode expansion method provides an avenue to extract individual modes in a multi-modal guided wave propagation scenario. The team implements a mode separation technique based on the normal mode expansion and demonstrates its effectiveness in propagating guided waves in an aluminum bar with a rectangular cross-section. Instead of monitoring the wave profiles at the bar end, by the application of mapped field distribution, we can evaluate the amplitude of propagating guided waves at any location. The effectiveness of the proposed technique is verified through numerical models.
Peng Zhang,Keping Zhang, andXuan Zhu
"Guided waves mode separation based on the normal mode expansion method (Conference Presentation)", Proc. SPIE 12488, Health Monitoring of Structural and Biological Systems XVII, 124880C (25 April 2023); https://doi.org/10.1117/12.2657733
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Peng Zhang, Keping Zhang, Xuan Zhu, "Guided waves mode separation based on the normal mode expansion method (Conference Presentation)," Proc. SPIE 12488, Health Monitoring of Structural and Biological Systems XVII, 124880C (25 April 2023); https://doi.org/10.1117/12.2657733