2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA)最新文献_第8页

High-frequency emi signatures for damaged plates using finite element method 基于有限元法的损伤板高频电磁干扰特征分析

2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2011-12-01 DOI: 10.1109/SPAWDA.2011.6167271

W. Yan, Wan-Chun Li, Ji Wang, Wei-qiu Chen

{"title":"High-frequency emi signatures for damaged plates using finite element method","authors":"W. Yan, Wan-Chun Li, Ji Wang, Wei-qiu Chen","doi":"10.1109/SPAWDA.2011.6167271","DOIUrl":"https://doi.org/10.1109/SPAWDA.2011.6167271","url":null,"abstract":"Based on the finite element method, an electromechanical impedance (EMI) model for a damaged plate with imperfectly bonded piezoelectric patches is established in the paper. The property of bonding layer between the PZT sensor/actuators and the host plate is taken into account based on the peel stress model as well as the shear lag model. The damage appearing in the plate is modeled by a change in Young's modulus in the damaged area. Then, the three-dimensional (3D) model of piezoelectric patch-adhesive-damaged plate coupled system is developed. Both the peel stress and the shear stress along the piezoelectric patches are simulated under various excitation frequencies. The numerical results show that excitation frequency affect remarkably the shear stress as well as the peel stress distribution between PZT wafers and host plate and thus some assumptions adopted in the conventional EMI models should be revised accordingly. Finally, the effects of damage severity and expansion on high-frequency EMI signatures are investigated. The simulation indicates that the present EMI model can be used to detect the damages in the structures.","PeriodicalId":285701,"journal":{"name":"2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114218211","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Effect of preparation method on properties of BNT-BKT-BT piezoelectric ceramics 制备方法对BNT-BKT-BT压电陶瓷性能的影响

2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2011-12-01 DOI: 10.1109/SPAWDA.2011.6167243

Jun Liu, Ling Fei, Caifeng Chen, Xiao-li Han, Ying Luo

{"title":"Effect of preparation method on properties of BNT-BKT-BT piezoelectric ceramics","authors":"Jun Liu, Ling Fei, Caifeng Chen, Xiao-li Han, Ying Luo","doi":"10.1109/SPAWDA.2011.6167243","DOIUrl":"https://doi.org/10.1109/SPAWDA.2011.6167243","url":null,"abstract":"0.852Bi<inf>0.5</inf>Na<inf>0.5</inf>TiO<inf>3</inf>-0.120Bi<inf>0.5</inf>K<inf>0.5</inf>TiO<inf>3</inf>-0.028BaTiO<inf>3</inf>(BNT-BKT-BT) ceramics prepared by solid state reaction and hydrothermal method is investigated in this paper. The study is aimed at finding out the effects of different preparation methods on dielectric and piezoelecrtic properties of BNT-BKT-BT ceramics. BNT-BKT-BT ceramics were fabricated by conventional solid state reaction and hydrothermal method. XRD results show that a pure perovskite without a secondary phase is structured, while the diffraction intensity of the powder by solid state reaction is higher than that of the powder by hydrothermal method. At the same time, SEM shows a significant difference of surface topography between the ceramics comes up with different preparation methods, which also takes place in dielectric and piezoelectric properties of the ceramics. The values of piezoelectric constant d<inf>33</inf>, dielectric constant ε<inf>r</inf>, mechanical quality factor Q<inf>m</inf>, and electromechanical planar coupling coefficients k<inf>p</inf> of BNT-BKT-BT ceramics by solid state reaction are higher than that of ceramics by hydrothermal method while the dielectric loss factor tanδ and thick electromechanical coupling factor k<inf>t</inf> is lower. The experimental results reveal that the preparation method is of great help in taking effect on dielectric constant ε<inf>r</inf>, and piezoelectric constant d<inf>33</inf>.","PeriodicalId":285701,"journal":{"name":"2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA)","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115273639","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Flexible sensors based on piezoelectret films 基于压电体薄膜的柔性传感器

2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2011-12-01 DOI: 10.1109/SPAWDA.2011.6167272

Qiong You, K. Lou, Xiaoqing Zhang, Ye-wen Zhang

引用次数: 1

Determining the location and severity of a beam crack based on piezoelectric guided wave 基于压电导波的梁裂纹位置和严重程度的确定

2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2011-12-01 DOI: 10.1109/SPAWDA.2011.6167198

Dansheng Wang, Hong-yuan Song, Dan-yan Shen, Hong-ping Zhu

引用次数: 0

Experimental technique based on delay phase angle and PIV measurements of a dual synthetic jets actuator 基于延迟相位角和PIV测量的双合成射流作动器实验技术

2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2011-12-01 DOI: 10.1109/SPAWDA.2011.6167241

Zhen-bing Luo, Xiong Deng, Lin Wang, Z. Xia

{"title":"Experimental technique based on delay phase angle and PIV measurements of a dual synthetic jets actuator","authors":"Zhen-bing Luo, Xiong Deng, Lin Wang, Z. Xia","doi":"10.1109/SPAWDA.2011.6167241","DOIUrl":"https://doi.org/10.1109/SPAWDA.2011.6167241","url":null,"abstract":"There is a delay phase angle between the displacement signal and voltage signal of PZT-driven actuator. The higher the driving frequency, the larger delay phase angle of the PZT vibrator will be. Based on the delay phase angle of the PZT vibrator, a transfer-phase and sub-frequency (TPSF) technique was provided to capture the arbitrary phase of the dual synthetic jets, and a transfer-phase to equal (TPE) technique was provided to determine the phase of the dual synthetic jets. A PZT-driven dual synthetic jets actuator was measured based on the technique. The results demonstrate the TPSF and TPE techniques are effective. And a circle of the dual synthetic jets is divided into “left” stage and “right” stage. In the “left” stage, the dual synthetic jets flow-field is dominated by the left jet; and in the “right” stage, the dual synthetic jets flow-field is dominated by the right jet. In the near field downstream of the dual synthetic jets actuator, the two jets entrain fluid around them and interact with each other, and the flow-field is more complex and there is a phenomenon of “self-support” between the dual synthetic jets. In the far field downstream of the dual synthetic jets actuator, the two jets merge a single, more stable synthetic jet.","PeriodicalId":285701,"journal":{"name":"2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121340511","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

A wireless pressure sensor based on surface transverse wave 一种基于表面横波的无线压力传感器

2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2011-12-01 DOI: 10.1109/SPAWDA.2011.6167233

A-long Kang, Wei-biao Wang, You-Qun Liu, Tao Han

引用次数: 6

Electro-mechanical analysis of piezoelectric patch bonding to beams 压电贴片粘接梁的机电分析

2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2011-12-01 DOI: 10.1109/SPAWDA.2011.6167288

J. Yang, Yun Wang, R. Xu

引用次数: 3

Forecasting model for the ideal pre-force of cylindrical bending rotation ultrasonic motor 圆柱形弯曲旋转超声电机理想预力预测模型

2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2011-12-01 DOI: 10.1109/SPAWDA.2011.6167221

Ting-hai Cheng, Xiang-dong Guo, Gang Bao

引用次数: 0

Study on the dual-excited full-wavelength piezoelectric ultrasonic transducer 双激发全波长压电超声换能器的研究

2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2011-12-01 DOI: 10.1109/SPAWDA.2011.6167228

Zhao-feng Liang, Guang-ping Zhou, Xi-ping Mo, Zhengzhong Li

引用次数: 0

Transmission spectra of two-dimensional liquid-liquid phononic crystals 二维液-液声子晶体的透射光谱

2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2011-12-01 DOI: 10.1109/SPAWDA.2011.6167313

Fenglian Li, Yuesheng Wang, Chuanzeng Zhang

引用次数: 0