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March 14, 2026The Journal of the Acoustical Society of America

Experimental observation of non-collinear mixing of fundamental antisymmetric Lamb waves

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Authors

YIYosuke IshiiMYMasaaki YamamuraSBShiro Biwa

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Overview

Experimental observation validates wave mixing behavior in isotropic plates, suggesting new insights for wave interactions.

Key Points

  • This research aims to experimentally investigate the non-collinear mixing of Lamb waves in a nonlinear isotropic plate and validate theoretical predictions.
  • Measured sum-frequency components of mixed A0 Lamb waves in a 2-mm aluminum alloy plate.
  • Utilized two primary frequency pairs: 0.6/0.6 MHz and 0.55/0.65 MHz.
  • Performed wavenumber-frequency spectrum analysis based on temporal waveforms at various distances.
  • Conducted non-collinear measurements at different intersection angles of A0 modes.
  • Identified sum-frequency components at 1.2 MHz as fundamental S0 Lamb waves, aligning with theoretical predictions.
  • Determined that the amplitude of the sum-frequency S0 mode increases near the angle for internal resonance.
  • Noted a slight shift in maximum amplitude location from the theoretical resonant angle, consistent with numerical simulations.

Cite This Study

Ishii et al. (2026) studied this question.

synapsesocial.com/papers/69b4fb9db39f7826a300bf43https://doi.org/10.1121/10.0043004
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