TY - GEN
T1 - The nonlinear dynamics of flexural ultrasonic transducers
AU - Feeney, Andrew
AU - Kang, Lei
AU - Rowlands, George
AU - Dixon, Steve
N1 - Publisher Copyright:
©2020 Acoustical Society of America.
PY - 2020/2/24
Y1 - 2020/2/24
N2 - Dynamic nonlinearity can manifest as changes in characteristic properties of a vibrating system in response to variations in excitation. This study investigates the nonlinearity in the vibration response of the flexural ultrasonic transducer. This device is typically employed for industrial measurement, but little is known about the influence of changes in excitation on its dynamics. In general, the resonance frequency of an ultrasonic device is known to shift as excitation amplitude is increased, displaying either hardening nonlinear behaviour, where resonance frequency increases, or softening associated with resonance frequency decrease. In typical operation, the vibration response of the flexural ultrasonic transducer has been found to be weakly nonlinear. Different physical mechanisms can cause nonlinearity, including structural configuration, the physical responses of components such as the transducer membrane, and thermomechanical properties inherent in piezoelectric materials. The nonlinear behaviour of flexural ultrasonic transducers is shown in the context of typical operation in practical application, through laser Doppler vibrometry and supported by fundamental mathematics.
AB - Dynamic nonlinearity can manifest as changes in characteristic properties of a vibrating system in response to variations in excitation. This study investigates the nonlinearity in the vibration response of the flexural ultrasonic transducer. This device is typically employed for industrial measurement, but little is known about the influence of changes in excitation on its dynamics. In general, the resonance frequency of an ultrasonic device is known to shift as excitation amplitude is increased, displaying either hardening nonlinear behaviour, where resonance frequency increases, or softening associated with resonance frequency decrease. In typical operation, the vibration response of the flexural ultrasonic transducer has been found to be weakly nonlinear. Different physical mechanisms can cause nonlinearity, including structural configuration, the physical responses of components such as the transducer membrane, and thermomechanical properties inherent in piezoelectric materials. The nonlinear behaviour of flexural ultrasonic transducers is shown in the context of typical operation in practical application, through laser Doppler vibrometry and supported by fundamental mathematics.
UR - http://www.scopus.com/inward/record.url?scp=85087547025&partnerID=8YFLogxK
U2 - 10.1121/2.0001095
DO - 10.1121/2.0001095
M3 - Conference contribution
AN - SCOPUS:85087547025
T3 - Proceedings of Meetings on Acoustics
BT - 2019 International Congress on Ultrasonics
PB - Acoustical Society of America
T2 - 2019 International Congress on Ultrasonics, ICU 2019
Y2 - 3 September 2019 through 6 September 2019
ER -