Analytical and numerical modeling of resonant piezoelectric devices in China-A review

Abstract

The results on theoretical and numerical modeling of resonant piezoelectric devices in China are reviewed. Solutions to dynamic problems of the propagation of bulk acoustic waves (BAW), surface acoustic waves (SAW), vibrations of finite bodies, and analyses of specific devices are discussed. Results from both the ultrasonics community and mechanics researchers are included. It is hoped that the paper will be useful for the understanding, communication and collaboration between Chinese and foreign scholars. The paper may also be helpful for bridging the gap between ultrasonics and mechanics researchers on piezoelectricity research. The paper contains 316 references.

A comparison between the epoxy-bonded layer structure and shear-lag model in a thickness-shear mode circular cylindrical piezoelectric transformer

“…Meanwhile, at the same resonances the input admittance and output energy flux also assume their maxima, which means the transformer is a resonant device operating at a particular frequency [24,28]. When there is no epoxy-bonded layer, the first resonance has the highest transforming ratio, output energy flux and input admittance, which owns to the fact that the higher corresponding modes have nodal points and some voltage cancellation usually occurs along the radius direction [1,24,28]. However, the thickness h changes its performance.…”

“…As a class of smart structures, piezoelectric transformer has been successfully made into many electronic devices, such as computer backlights, florescent ballast, portable electronic chargers, ignition of gas-discharge lamps, and compact ac/dc and dc/dc converters, etc., which are used to raise or lower a voltage [1][2][3]. All of these devices are based on the strong coupling property between electric and mechanical constitutive behavior.…”

A novel type of transverse surface wave propagating in a layered structure consisting of a piezoelectric layer attached to an elastic half-space

“…One type of the transverse surface wave is the Lovetype wave which is always dispersive and has more than one mode. The Love wave has been extensively studied and used in SAW sensors, filters, delay lines and the like [3][4][5][6][7]. Those who want to know detailed research work in this field can refer to the two newly published review papers [6,7] and the fruitful references therein.…”

“…The Love wave has been extensively studied and used in SAW sensors, filters, delay lines and the like [3][4][5][6][7]. Those who want to know detailed research work in this field can refer to the two newly published review papers [6,7] and the fruitful references therein. Another type of the transverse surface wave is the Bleustein-Gulyaev (B-G) wave, which exists and propagates only at the free surface of a piezoelectric half-space due to the interconnection between elastic and electric fields in piezoelectric materials [8,9].…”

Adjusting the resonant frequency of a segmented energy harvester through circuit connection patterns

“…Piezoelectric energy harvesters are the best candidates among them by converting mechanical energy into electric energy [1]. A piezoelectric energy harvester a resonant device [2][3], whose output electric power depends on whether the resonance frequency of the device structure match with input frequency of vibration. Therefore frequency of a particular mode for harvesting structure is needed to design at the frequency of input vibration [4][5][6].…”