TY  - CONF
A1  - Nicolai, Marcel
A1  - Bulling, Jannis
A1  - Lugovtsova, Yevgeniya
A1  - Zeipert, Henning
A1  - Prager, Jens
A1  - Henning, Bernd
T1  - On the repulsion effect of coupled Lamb wave modes
T2  - Fortschritte Der Akustik - DAGA 2024
N2  - This work investigates the phenomenon of mode repulsion in coupled Lamb wave systems. By mechanically coupling two dissimilar plates using spring elements, it is shown that previously intersecting Lamb wave modes are repelled, avoiding any crossing in the dispersion curves. The effect, rooted in eigenvalue theory and first observed in quantum systems, is explained through both mathematical models and classical analogies with coupled harmonic oscillators. Numerical simulations using the Scaled Boundary Finite Element Method validate the theoretical predictions, revealing a correlation between strain distribution and frequency splitting. The observed mode repulsion provides new insights into interface properties and offers potential for applications such as monitoring adhesive degradation in layered structures.
T2  - DAGA 2024
CY  - Hannover, Germany
DA  - 18.03.2024
KW  - Scaled Boundary Finite Element Method (SBFEM)
KW  - Lamb waves
KW  - Mode repulsion
KW  - Mechanical coupling
KW  - Dispersion curves
PY  - 2024
SP  - 632
EP  - 635
AN  - OPUS4-62854
LA  - eng
AD  - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER  -