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

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Frequency dependence of anomalous shift and polarization retention loss in ferroelectric capacitors 铁电电容器中异常移位和极化保留损耗的频率依赖性
2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2011-12-01 DOI: 10.1109/SPAWDA.2011.6167202
Feng Yang, M. Tang
{"title":"Frequency dependence of anomalous shift and polarization retention loss in ferroelectric capacitors","authors":"Feng Yang, M. Tang","doi":"10.1109/SPAWDA.2011.6167202","DOIUrl":"https://doi.org/10.1109/SPAWDA.2011.6167202","url":null,"abstract":"A unified model which takes into account an interfacial layer between electrode and ferroelectric film has been developed to study the fatigue, imprint and retention failures of ferroelectric capacitors. The anomalous shift of the hysteresis loops observed experimentally has been correctly reproduced with this model. It is found that such a shift is strongly dependent on the thickness ratio υ of the interfacial layer to the bulk film, as well as on the frequency of the external applied field. Furthermore, the model, when combined with the Schottky emission, can also properly describe the retention loss in polarization. Theoretical predictions based on this approach may provide a method to reduce the failure of ferroelectric capacitor.","PeriodicalId":285701,"journal":{"name":"2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA)","volume":"21 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":"124325263","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
Time dependence of piezoelectric d33 coefficient of cellular piezoelectret polypropylene film: Finite element modeling 胞状压电驻极体聚丙烯薄膜压电d33系数的时间依赖性:有限元建模
2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2011-12-01 DOI: 10.1109/SPAWDA.2011.6167257
Liangliang Fan, Y. Wan, Z. Zhong
{"title":"Time dependence of piezoelectric d33 coefficient of cellular piezoelectret polypropylene film: Finite element modeling","authors":"Liangliang Fan, Y. Wan, Z. Zhong","doi":"10.1109/SPAWDA.2011.6167257","DOIUrl":"https://doi.org/10.1109/SPAWDA.2011.6167257","url":null,"abstract":"In this article, the effective piezoelectric d33 coefficient of cellular piezoelectret polymer film is simulated by means of the finite element method. The cellular piezoelectret film is regarded as a periodic material, where the almost ellipsoidal voids produced by biaxial stretch are considered to be scattered periodically. The hollow oblate tetrakaidecahedron is used to model the charged microvoids. The polymer is take to be isotropic and viscoelastic. Representative volume element is adopted and the periodic boundary conditions are implemented. The electrostatic field coupled to the stress through the Maxwell stress tensor is analyzed. The piezoelectric d33 coefficient in the film thickness direction is phenomenologically defined and numerically obtained. Time dependence of the effective piezoelectric d33 coefficient is presented for different void geometrical parameters.","PeriodicalId":285701,"journal":{"name":"2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA)","volume":"44 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":"133807571","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
The finite element analysis of high-frequency vibrations of quartz crystal resonator strcuctures 石英晶体谐振器结构高频振动的有限元分析
2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2011-12-01 DOI: 10.1109/SPAWDA.2011.6167286
Ji-liang Li, Zefan Jin, Ji Wang
{"title":"The finite element analysis of high-frequency vibrations of quartz crystal resonator strcuctures","authors":"Ji-liang Li, Zefan Jin, Ji Wang","doi":"10.1109/SPAWDA.2011.6167286","DOIUrl":"https://doi.org/10.1109/SPAWDA.2011.6167286","url":null,"abstract":"Mindlin plate theory is widely used in the analysis of thickness-shear vibrations of quartz crystal resonators with analytical solutions of frequency and displacements. In the design of resonators, we always want to get accurate solutions for the determination of structural parameters. With complicated boundary conditions and geometry by taking packaging and electrodes into consideration, it will be impossible to solve with the Mindlin plate equations. On the other hand, the finite element method (FEM) with three-dimensional theory of piezoelectricity can efficiently solve such a problem,although earlier studies in the thickness-shear vibrations of quartz crystal resonators with actual model by popular FEM tools such as ANSYS are limited. Analytical modules are used in the analysis of the thickness-shear vibrations of quartz plates in this study, and the curve of fundamental frequency of thickness-shear vibration is obtained by changing the length and width of quartz crystal plates. In the analytical model with supports, through altering the length of plates, radius and the distance between conductive adhesive supports, the frequency curves with different parameters are obtained.","PeriodicalId":285701,"journal":{"name":"2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA)","volume":"223 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":"122893034","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
Stress concentration around a circular hole in a functionally graded material finite plate 功能梯度材料有限板圆孔周围的应力集中
2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2011-12-01 DOI: 10.1109/SPAWDA.2011.6167218
Quanquan Yang, C. Gao, Wen-tao Chen
{"title":"Stress concentration around a circular hole in a functionally graded material finite plate","authors":"Quanquan Yang, C. Gao, Wen-tao Chen","doi":"10.1109/SPAWDA.2011.6167218","DOIUrl":"https://doi.org/10.1109/SPAWDA.2011.6167218","url":null,"abstract":"This paper is to study the two-dimensional stress distribution of a finite functionally graded material (FGM) plate with a circular hole under arbitrary constant loads. With using the method of piece-wise homogeneous layers, the stress analysis of the finite FGM plate having radial arbitrary elastic properties is made based on complex variable method combined with least square boundary collocation technique. Numerical results of stress distribution around the hole are then presented for different loading conditions, different material properties and different plate sizes, respectively. It is shown that the stress concentration in the finite plate is generally enhanced compared with the case of an infinite plate, but it can be significantly reduced by choosing the proper change ways of the radial elastic modulus.","PeriodicalId":285701,"journal":{"name":"2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA)","volume":"72 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":"116312254","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: 3
Neural signals on adaptive paraboloidal cylindrical shells 自适应抛物面圆柱壳上的神经信号
2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2011-12-01 DOI: 10.1109/SPAWDA.2011.6167293
Shun-di Hu, Hua Li, H. Tzou
{"title":"Neural signals on adaptive paraboloidal cylindrical shells","authors":"Shun-di Hu, Hua Li, H. Tzou","doi":"10.1109/SPAWDA.2011.6167293","DOIUrl":"https://doi.org/10.1109/SPAWDA.2011.6167293","url":null,"abstract":"Paraboloidal cylindrical shells are commonly used as key components in communication antennas, space reflectors, solar collectors, etc. This study focuses on analysis of distributed sensing signals induced by piezoelectric sensors on a flexible simply-supported paraboloidal cylindrical shell panel. The PVDF layer fully laminated on the shell panel is segmented into infinitesimal patches to investigate the characteristic of distributed neural sensing signals. The transverse vibration is only considered since it is the dominant vibration component for paraboloidal cylindrical shells. A new mode shape function of the transverse vibration that satisfies the simply-supported boundary condition is derived. The shell whose meridian height and radial distance are the same is studied as a standard case. The curvature effect is the most primary fact that influence the piezoelectric signal generation. The modal neural signal reaches maximal at the ridge (high-curvature region) when the mode n is odd and inclines to the ridge region with oven modes.","PeriodicalId":285701,"journal":{"name":"2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA)","volume":"26 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":"116691692","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
Active vibration control of a stiffened plate with a piezoelectric actuator 基于压电驱动器的加筋板振动主动控制
2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2011-12-01 DOI: 10.1109/SPAWDA.2011.6167240
Ya-hong Zhang, Xi-nong Zhang
{"title":"Active vibration control of a stiffened plate with a piezoelectric actuator","authors":"Ya-hong Zhang, Xi-nong Zhang","doi":"10.1109/SPAWDA.2011.6167240","DOIUrl":"https://doi.org/10.1109/SPAWDA.2011.6167240","url":null,"abstract":"The main objective of this paper is to control the vibration of a cross-stiffened plate with a very small laminated piezoelectric actuator (LPA) under low voltage. Based on the ordinary Kirchhoff bending theory, the governing equation of flexural motion for a stiffened plated attached with a small LPA is derived by smearing the system to an equivalent plate. Analytical expression of the control force is obtained, based on the control force formula position of the LPA is optimized. For a simply supported rectangular cross-stiffened plate, Galerkin method is employed to calculate the response of the system uncontrolled and controlled as the velocity proportional feedback scheme is used. With a 4-layered LPA, only 1% area of the plate, the vibration during a wide frequency span is depressed significantly by voltage about 80V. Analytical and numerical results show that with a very small LPA on its optimal position, the vibrations of the stiffened plate during a wide frequency span can be attenuated with a rather low voltage.","PeriodicalId":285701,"journal":{"name":"2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA)","volume":"21 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":"117250620","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: 3
Study on the bandgaps of two-dimensional vacuum/solid phononic crystals with Helmholtz resonators 二维真空/固体声子晶体带隙的亥姆霍兹谐振器研究
2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2011-12-01 DOI: 10.1109/SPAWDA.2011.6167254
J. Ke, Yan-Feng Wang, Yue-Sheng Wang
{"title":"Study on the bandgaps of two-dimensional vacuum/solid phononic crystals with Helmholtz resonators","authors":"J. Ke, Yan-Feng Wang, Yue-Sheng Wang","doi":"10.1109/SPAWDA.2011.6167254","DOIUrl":"https://doi.org/10.1109/SPAWDA.2011.6167254","url":null,"abstract":"In this paper, we present a type of vacuum/solid phononic crystal composed of two-dimensional Helmholtz resonators, which is called Helmholtz resonant phononic crystals. By using the finite element method, bandgaps and vibration modes are studied. The numerical computation is performed by Comsol Multiphysics 3.5a. The results show that complete resonant bandgaps exist for the Helmholtz resonant phononic crystals, and also a lower full bandgap appears for the mixed mode. The results are related to optimization of the acoustic bandgaps.","PeriodicalId":285701,"journal":{"name":"2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA)","volume":"16 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":"125608085","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: 3
Band structures of 2-D sonic crystals with square lattices based finite element method 基于方阵的二维声波晶体带结构有限元分析
2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2011-12-01 DOI: 10.1109/SPAWDA.2011.6167302
Bin Wu, Zong-fa Liu, C. He
{"title":"Band structures of 2-D sonic crystals with square lattices based finite element method","authors":"Bin Wu, Zong-fa Liu, C. He","doi":"10.1109/SPAWDA.2011.6167302","DOIUrl":"https://doi.org/10.1109/SPAWDA.2011.6167302","url":null,"abstract":"Sonic crystals are composite materials made of periodic distributions of inclusions embedded in a matrix. Due to the periodicity, these materials may exhibit complete acoustic band gaps within which sound and vibrations are forbidden. In this paper, the band gap characteristics of a 2-D square array of hollow cylinders and spit-ring hollow cylinders embedded in air are investigated by COMSOL® finite element method, and then verified by plane wave expansion method. The results are very consistent, proving that COMSOL® can be employed for the full characterization of the structures.","PeriodicalId":285701,"journal":{"name":"2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA)","volume":"298 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":"126973928","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
Numerical analysis on an annular bimorph piezoelectric power harvester with the out-of-plane vibration mode 具有面外振动模式的环形双晶片压电电力采集器的数值分析
2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2011-12-01 DOI: 10.1109/SPAWDA.2011.6167290
Jianfeng Lan, Lin Hu, Hairen Wang, Jun Cheng, Hongping Hu
{"title":"Numerical analysis on an annular bimorph piezoelectric power harvester with the out-of-plane vibration mode","authors":"Jianfeng Lan, Lin Hu, Hairen Wang, Jun Cheng, Hongping Hu","doi":"10.1109/SPAWDA.2011.6167290","DOIUrl":"https://doi.org/10.1109/SPAWDA.2011.6167290","url":null,"abstract":"This paper proposes a piezoelectric annular bimorph power harvester (PABPH) aiming at scavenging mechanical vibration energy exists in the ambient environment. Abundant energy of the ambient vibration mainly contains in low frequency. In order to decrease the resonate frequency and miniaturize the device, finite element model is present for the harmonic and modal analysis of the PABPH. Numerical results show that maximum of the output power density of the PABPH does not always appear on its first resonance frequency. The resonance frequency depends on the structure parameters of the PABPH, such as the length and the thickness. After being optimized on length of annular plate and thickness of metal layer, the PABPH has an output power density of 36 µW / cm3 when driven by ambient vibration with amplitude of 1mN and frequency of 50 Hz.","PeriodicalId":285701,"journal":{"name":"2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA)","volume":"32 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":"121654483","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
Energy analysis of a piezoelectric patch laminated on cylindrical panels subjected to harmonic line loadings 谐波线荷载作用下圆柱形板上压电片的能量分析
2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2011-12-01 DOI: 10.1109/SPAWDA.2011.6167300
Shuang-shuang Wang, Zheng Rao, H. Tzou
{"title":"Energy analysis of a piezoelectric patch laminated on cylindrical panels subjected to harmonic line loadings","authors":"Shuang-shuang Wang, Zheng Rao, H. Tzou","doi":"10.1109/SPAWDA.2011.6167300","DOIUrl":"https://doi.org/10.1109/SPAWDA.2011.6167300","url":null,"abstract":"In order to transform the vibration energy into electric energy, piezoelectric materials are often used due to their properties. This paper proposes an energy analysis model of cylindrical panels laminated with piezoelectric patch. With simply supported boundary condition at four sides, panels are excited by harmonic line loadings in transverse direction. Love & Kirchhoff thin shell theory and electromechanical equations are used to derive the voltage across the surface area of the piezoelectric patch. Considering the thin thickness of piezoelectric patch, its capacitance can be estimated by utilizing the formula of plate capacitor. Consequently, the energies can be presented with the equations only containing variables of capacitance and voltage. In case study, effect of the line loading location is firstly studied. The results show that the optimal position of longitudinal line loading is related to circumferential mode number, while it's only related to longitudinal mode number for circumferential line loading. The effect of the cylindrical panel curvature is also discussed afterward.","PeriodicalId":285701,"journal":{"name":"2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA)","volume":"12 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":"122480396","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: 1
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