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| 1 | Analytical and numerical modeling of resonant piezoelectric devices in China-A review显示文摘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 re- search. The paper contains 316 references. | YANG JiaShi1,2↑ & YANG ZengTao1 1 Institute of Mechanics and Sensing Technology, School of Civil Engineering and Architecture, Central South University, Changsha 410083, China 2 Department of Engineering Mechanics, University of Nebraska, Lincoln, NE 68588-0526, USA | 2008 | Science China(Physics,Mechanics & Astronomy)2008，51，12： | 2 |
| 2 | ACOUSTICAL TRANSMISSION LINE MODEL FOR ULTRASONIC TRANSDUCERS FOR WIDE-BANDWIDTH APPLICATION显示文摘An improved model for ultrasonic transducers is proposed.By considering only the first symmetric mode,each layer is represented as an acoustical transmission line in modeling of bulk wave transducers.In imaging applications,wide bandwidth and short time duration are required.The approach we have used consists of impedance matching the front face of the piezoelectric transducer to the propagating medium with a quarter wavelength impedance matching layer and inserting an unmatching quarter wavelength acoustical layer between the rear face and backing material.A heavy backing would degrade the wide-band phenomena,but show a time duration shorter than 0.5 μs for imaging applications.PSPICE code of the controlled source model is implemented to precisely predict the performance of the matched transducers such as impedance,insertion loss,bandwidth and duration of the impulse response.Good agreement between the simulation and experimental results has been achieved. | Yeongchin Chen | 2010 | Acta Mechanica Solida Sinica2010，23，2： | 1 |
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