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| 1 | COUPLED ANALYSIS FOR THE HARVESTING STRUCTURE AND THE MODULATING CIRCUIT IN A PIEZOELECTRIC BIMORPH ENERGY HARVESTER显示文摘The authors analyze a piezoelectric energy harvester as an electro-mechanically coupled system.The energy harvester consists of a piezoelectric bimorph with a concentrated mass attached at one end,called the harvesting structure,an electric circuit for energy storage, and a rectifier that converts the AC output of the harvesting structure into a DC input for the storage circuit.The piezoelectric bimorph is assumed to be driven into flexural vibration by an ambient acoustic source to convert the mechanical energies into electric energies.The analysis indicates that the performance of this harvester,measured by the power density,is characterized by three important non-dimensional parameters,i.e.,the non-dimensional inductance of the storage circuit,the non-dimensional aspect ratio (length/thickness) and the non-dimensional end mass of the harvesting structure.The numerical results show that:(1) the power density can be optimized by varying the non-dimensional inductance for each fixed non-dimensional aspect ratio with a fixed non-dimensional end mass;and (2) for a fixed non-dimensional inductance,the power density is maximized if the non-dimensional aspect ratio and the non-dimensional end mass are so chosen that the harvesting structure,consisting of both the piezoelectric bimorph and the end mass attached,resonates at the frequency of the ambient acoustic source. | Yuantai Hu Ting Hu Qing Jiang | 2007 | Acta Mechanica Solida Sinica2007，20，4： | 7 |
| 2 | 一种新型径向复合阶梯盘形压电变压器显示文摘提出一种新型径向复合压电陶瓷变压器,并应用等效电路方法对阶梯金属圆环和厚度极化的压电振子的径向振动,以及阶梯厚度比与最大电压增益及机电耦合系数的关系进行分析.得到的此变压器的等效电路,推导出输入阻抗、共振频率、反共振频率、电压增益和功率效率的解析解,并将计算所得的共振频率、反共振频率与ANSYS模拟结果进行比较验证.结果表明:变压器在共振频率驱动下获得最大电压增益,在共振频率和反共振频率下获得最大功率效率;电压增益和功率效率在固定频率下,都存在着最佳负载. | 李果 林书玉 | 2014 | 陕西师范大学学报(自然科学版)2014，42，1： | 2 |
| 3 | 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 |
| 4 | HIGH-FREQUENCY VIBRATIONS OF CORRUGATED CYLINDRICAL PIEZOELECTRIC SHELLS显示文摘顺利由圆形的圆柱的表面的多重片组成的弄皱的圆柱的压电的壳的圆柱的颤动沿着他们的母点连接了的联合 extensional 和 exural 被学习。与短波长为相对厚的壳或相等地高周波的模式的盒子验证结果,存在分析被考虑扩大砍变丑和旋转惯性。一个分析答案被获得。基于答案,反响的频率和模式形状被计算。 | Hualong Du Limei Xu Hongping Hu Yuantai Hu Xuedong Chen Hui Fan Jiashi Yang | 2008 | Acta Mechanica Solida Sinica2008，21，6： | 1 |
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