Viscardi M., Amoroso F., Lecce L.

Active Constained Layer Damping represent an interesting hybrid solution to increase the structural damping of metal structures. As a consequence of energy dissipation efficiency, a reduced acoustic efficiency is generally measured. Within this work, the numerical modeling of ACLD add-on device applied to a reinforced aluminium plate has been assessed and experimentally preliminary validated through the comparison of vibrational and acoustic data. The FEM/BEM approach has been used for the numerical modeling, where the classical strain actuation model has been introduced for the adapting piezo effest simulation. The experimental investigations have been also performed by the use of combined approachs, based upon the laser-doppler vibrometry and acosutic intensity and imaging technique.