This study investigates the transverse and planar vibration characteristics of two-layered piezoceramic disks and three-layered piezoelectric bimorphs for traction-free boundary conditions by theoretical analysis, finite element numerical calculation, and experimental measurements. Amplitude-fluctuation electronic speckle pattern interferometry (AF-ESPI), laser Doppler vibrometer (LDV), and impedance analysis were used to perform measurements and verify the theoretical solutions for extensional, tangential, and transverse vibrations. The poling directions of piezoelectric elements determines whether they are denoted as either of series- or parallel-type. This study observed that the resonant frequencies and mode shapes of the series- and parallel-type piezoceramic disks and bimorphs present different dynamic characteristics in resonance. Planar and transverse vibrations are coupled in series-type piezoceramic disks and uncoupled in those of parallel-type. The in-plane resonant modes are observed for parallel-type piezoelectric bimorph in parallel connections; however, the in-plane mode shapes are similar to the out-of-plane mode shapes for the series-type piezoelectric bimorph in series connection. Hence, the particle motions of the piezoelectric bimorph at resonance are essentially three-dimensional for the normal connection. It is interesting to note that both symmetric and asymmetric out-of-plane vibration mode shapes can be excited with large applied voltage but no in-plane motion is observed for the abnormal connection. Good agreements of dynamic characteristics determined by theoretical analysis, experimental measurements, and numerical calculation are presented for series- and parallel-type piezoceramic disks and bimorphs.

Selecsted Journal Paper in this topic:

Yu-Hsi Huang, Chien-Ching Ma, Zheng-Zhi Li (2014, Jan). Investigations on Vibration Characteristics of Two-Layered Piezoceramic Disks. International Journal of Solids and Structures, vol 51, no. 1, pp. 227-251. (SCI).

Yu-Hsi Huang, Chien-Ching Ma, and Ching-Kong Chao, “High-frequency Resonant Characteristics of Triple-layered Piezoceramic Bimorphs Determined Using Experimental Measurements and Theoretical Analysis,” IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, vol. 59, no. 6, pp.1219-1232. (SCI/EI)

Yu-Hsi Huang and Chien-Ching Ma, “Experimental and Numerical Investigations of Vibration Characteristics for Parallel-type and Series-type Triple layered Piezoceramic Bimorphs,” IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, vol. 56, no. 18, pp.2598-2611, 2009. (SCI/EI)

Chien-Ching Ma, Yu-Chih Lin, Yu-Hsi Huang, and Hsien-Yang Lin, “Experimental Measurement and Numerical Analysis on Resonant Characteristics of Cantilever Plates for Piezoceramic Bimorphs,” IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, vol. 54, no. 2, pp.227-239, 2007. (SCI/EI)