Traveling wave excitation in a flexural vibration ring by using a torsional-flexural composite transducer

This paper presents a new mechanism for traveling wave excitation of the fl exural vibration in a ring. A torsional-flexural composite transducer was u sed to excite two degenerate flexural vibration modes spatially and tempora lly orthogonal to each other in the ring. The prototype, composed of a 32-m m diameter composite transducer attached along the outer edge of an 180-mm diameter aluminum annular ring, was designed, constructed, and tested. The ring was designed via finite element analysis to operate using a (0,8) tran sverse flexural traveling wave, and the motion was confirmed experimentally .