This study proposes a method of designing electrodes for piezoelectric plates and shells to improve the electromechanical coupling efficiency of out-of-plane and in-plane vibration. Three experimental techniques were employed to investigate the three-dimensional vibrations. We first used a non-contact, full-field measurement technique called amplitude-fluctuation electronic speckle pattern interferometry (AF-ESPI) to determine resonant frequencies and mode shapes in real time. Second, a point-wise measurement device called a laser Doppler vibrometer (LDV) was used to obtain the spectrum for out-of-plane frequencies. Third, the impedance analysis was applied to measure on the resonant frequencies and anti-resonant frequencies, which are corresponding to the in-plane resonant modes. Four electrode designs with completely free boundary conditions were used to study the electromechanical coupling efficiency of piezoelectric plates and shells. We conclude that the design of electrodes influences the electromechanical coupling efficiency of piezoelectric plates and shells. The experimental results related to resonant frequency and mode shape were verified using the finite element method (FEM). The numerical calculations are in strong agreement with experimental results. Furthermore, in accordance with the electric potential gradient predicted by FEM, which is similar to the mode shape in AF-ESPI experimental measurements, the electrode distribution can be designed according to the best vibrational excitation in piezoelectric plates and shells. This study proposes electromechanical coupling to predict the efficiency of transverse vibration in piezoelectric plates and shells.。

Selected Journal Paper in this topic:

Yu-Hsi Huang, “Electromechanical Coupling Efficiency of Transverse Vibration in Piezoelectric Plates According to Electrode Configuration,” Journal of the Chinese Institute of Engineers, vol. 36, no. 7, pp. 842-855, 2013. (SCI/EI)

Yu-Hsi Huang and Chien-Ching Ma, “Experimental Measurements and Finite Element Analysis of the Coupled Vibrational Characteristics of Piezoelectric Shells,” IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, vol. 59, no. 4，pp. 785-798. (SCI/EI)

Anastasiia Krushynska, Viatcheslav Melechko, Chien-Ching Ma, and Yu-Hsi Huang “Mode Excitation Efficiency for Contour Vibrations of Piezoelectric Resonators,” IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, vol. 58, no. 10, pp.2222-2238, 2011. (SCI/EI)

Yu-Hsi Huang and Chien-Ching Ma, “Finite Element and Experimental Results of Transverse Vibration for GT-cut and SC-cut Quartz Plates with Fixed and Free Boundary Conditions and Multiple Methods of Excitation,” Smart Materials and Structures, vol. 18, no. 8, 085017, August, 2009. (SCI/EI)

Yu-Hsi Huang and Chien-Ching Ma “Forced Vibration Analysis of Piezoelectric Quartz Plates in Resonance,” Sensors and Actuators (A), vol. 149, no. 2, pp. 320-330, 2009. (SCI/EI)