J042014 Excitation of higher order torsional guided waves and simultaneous excitation of spurious circumferential Lamb waves by the ring-shaped PZT sensor

Abstract

Excitation of higher-order mode guided waves using a piezoelectric ring-shaped transducer were presented. The principle of the transduction and the experimental verifications of the T(0,1), T(1,1) and T(2,1) mode generations in frequency range from 30 kHz to 80 kHz were shown. It was also confirmed that the circumferential Lamb waves were excited resonantly by the piezoelectric ring-shaped transducer as spurious signals at appropriate frequencies.