Abstract. This work deals with the mode selection of Lamb waves generated in thin
aluminium plates by using bonded piezoceramics. The experimental dispersion
curves were obtained applying a 2D FFT algorithm to the data collected from an
optical vibrometer. A Finite Element Model, using a commercial simulation
program, PZFlex, was also developed to calculate the dispersion curves and to
compare them with the analytical and experimental ones. Next, the Lamb wave
modes were selectively reinforced or cancelled by bonding another piezoceramic to
the plate at an appropriate location. Different models using PZFlex were developed
to calculate the dispersion curves verifying the mode cancellations. The
experimental measurements show good agreement with the models.