文献类型：期刊文献

英文题名：Dynamic coupling and experimental study on flexural transducer used in near field acoustic levitation

作者：Li, Jin[1];Liu, Pinkuan[2];Ding, Han[2]

机构：[1]E China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai 200237, Peoples R China;[2]Shanghai Jiao Tong Univ, Sch Mech Engn, Shanghai 200240, Peoples R China

年份：2014

卷号：8

期号：3

起止页码：1

外文期刊名：JOURNAL OF ADVANCED MECHANICAL DESIGN SYSTEMS AND MANUFACTURING

收录：;EI(收录号：20163802829373);WOS:【SCI-EXPANDED(收录号:WOS:000356776500013)】；

基金：This research was supported in part by the National Natural Science Foundation of China under Grant No. 51305138, the Science & Technology Commission of Shanghai Municipality under Grant No. 13ZR1453300 and Opening Fund of State Key Lab of Digital Manufacturing Equipment & Technology under Grant No. DMETKF2014013.

语种：英文

外文关键词：Acoustic levitation; Dynamic coupling; Flexural vibration; Energy efficiency; FEA

摘要：Acoustic transducers with large radiation surfaces are used to handle planar object without any physical contact. To more accurately describe the dynamic performance of such transducer with strong coupling effect due to the large lateral scales, a mathematical model with flexural boundary conditions and gas inertia is presented in this paper. A coupled 3D finite element method model has been built and simulated with an identical experimental condition. The influences of dynamic coupling on the transducer performances and the levitation behaviors have been studied. We have found that under the strong dynamic coupling between the PZT and the large vibrator, the lowest impedance of the transducer shifts to the 2nd resonant frequency, instead of locating at the 1st resonant in a general case. Experiments have been set up to validate the coupling effects. Good agreement between the calculations and the experimental results indicates that the coupling plays an important role in the dynamic behaviors of the transducers with large lateral scales. Our work has improved the model's precision and provides an optimization tool to construct acoustic transducers used in the Near Field Acoustic Levitation.