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检索条件"任意字段=2015全国压电和声波理论及器件技术研讨会"

共 417 条记录，以下是61-70 订阅

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INFLUENCE OF INITIAL STRESSES ON RESONANCE PROPERTIES OF FBAR

INFLUENCE OF INITIAL STRESSES ON RESONANCE PROPERTIES OF FBA...

引用

2012全国压电和声波理论及器件技术研讨会

作者： De-jin HUANG Xin-yi LUO Ji WANG School of Mech Eng & Mechanics Ningbo University

This paper investigated the effects of initial stresses on resonance properties of Film Bulk Acoustic Resonator(FBAR) in thickness-stretch *** on the fundamental piezoelastic equations of piezoelectric material with initial stress,the vibration equation of ideal FBAR under sine excitation voltage is *** solution is then obtained by using of the boundary *** series and parallel resonance frequency are presented,and the effects of initial stresses on resonance frequency,bandwidth,and effective electromechanical coupling coefficient are discussed.A numerical example is presented to show the *** results are very useful for the improvement of designing FBAR.

关键词： FBAR Initial stress Resonance frequency Bandwidth

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THREE-DIMENSIONAL VIBRATION ANALYSIS OF THE SPLIT ELECTRODE VIBRATOR USING FINITE ELEMENT METHOD

THREE-DIMENSIONAL VIBRATION ANALYSIS OF THE SPLIT ELECTRODE ...

引用

2012全国压电和声波理论及器件技术研讨会

作者： Lin FU Dong WANG Xiu-ming WANG State Key Laboratory of Acoustics Institute of AcousticsChinese Academy of Sciences

In this paper,ANSYS based on the finite element method is used to investigate the effects of geometry and electrodes of a split thin piezoelectric ceramic strip on its resonant frequencies and conductance related to the *** numerical results show that the fundamental frequencies decrease as the vibrator length and width *** it is mainly influenced by the longest dimension of the *** for the split electrode vibrator,when the electrode area decreases,the resonant frequencies will increase while the conductance *** order of resonant frequencies corresponding to the highest conductance is equal to the number of electrodes in the vibration *** the way of splitting electrode can increase the vibrator *** numerical results are in agreement with the existing theoretical result for the simplified *** work will give some insights for the design of high-frequency and high-performance transducer.

关键词： Resonant frequencies Conductance Sensitivity Split electrode vibrator

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SELF ASSEMBLY OF PARTICLES USING PHONONIC CRYSTAL SLABS

SELF ASSEMBLY OF PARTICLES USING PHONONIC CRYSTAL SLABS

引用

2012全国压电和声波理论及器件技术研讨会

作者： Qian WU Fei-yan CAI Hai-rong ZHENG Zhi-wen CUI Shenzhen Institutes of Advanced Technology Chinese Academy of Sciences Department of physics Jilin University

By numerically studying the acoustic radiation forces on particle above the phononic crystal slabs(PCS),we show that a guided resonant mode of PCS yields a resonantly-enhanced,stably trapped acoustic radiation force on the *** trapping patterns and acoustic radiation force dependent on the wavelength,particle size,and particle material are investigated,*** is shown that tuning the wavelength of incident acoustic wave may thus allow the formation and reconfiguration of *** expect that this system may thus allow to realize self-assembly particles.

关键词： Acoustic radiation force Self-assembly Phononic crystal

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THEORY ON THE AIR-COUPLE WAVE PROPAGATION IN LAYERED COMPOSITE MATERIALS WITH LAMINATE DEFECT

THEORY ON THE AIR-COUPLE WAVE PROPAGATION IN LAYERED COMPOSI...

引用

2012全国压电和声波理论及器件技术研讨会

作者： Song LING Yong-dong PAN Kao-shan DAI Institute of Acoustic Tongji University School of Aerospace and Applied Mechanics Tongji University School of Civil Engineering Tongji University

It has been known for many years that defects exist along interfaces between two dissimilar materials,and conventional contact ultrasonic techniques are not always enable to detect the defects,so more advanced methods are still *** this paper,the spring model for the layered composite materials is built to simulate wave propagation.A stiffness matrix-based method is proposed for quantifying the transmission *** solutions of the characteristic equations are numerically efficient and *** work has shown that the spring models are well adapted to evaluate the quality and integrity of complex composite structures.

关键词： Spring model Stiffness matrix Laminate composite materials Air-coupled

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FREQUENCY-TEMPERATUREANALYSIS OF THICKNESS-SHEAR VIBRATIONS OF SC-CUTQUARTZ CRYSTAL PLATES WITH THE FIRST-ORDER MINDLIN PLATE EQUATIONS

FREQUENCY-TEMPERATUREANALYSIS OF THICKNESS-SHEAR VIBRATIONS ...

引用

2012全国压电和声波理论及器件技术研讨会

作者： Wen-jun WANG Ji WANG Gui-jia CHEN Jian-ke DU Ting-feng MA Piezoelectric Device Laboratory School ofMechanical Engineering & Mechanics Ningbo University

With the incremental thermal field theory by Lee and Yong,we have truncated equations for the analysis of thickness-shear vibrations of SC-cut crystal *** assuming straight-crested waves in a rectangular plate,we obtained the frequency-temperature relations of the thickness-shear mode to study the effect of plate configurations as well as the electrodes for the properties of quartz crystal *** before,such results will be useful in the accurate design and improvement of resonator structures.

关键词： SC-cut quartz crystal plates Mindlin plate theory Vibration Frequency-temperature behavior

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THICKNESS-SHEAR AND THICKNESS-TWIST MODES IN AN OBLATE ELLIPTICAL CERAMIC CYLINDER AND ENERGY TRAPPING IN CONTOURED ACOUSTIC WAVE RESONATORS

THICKNESS-SHEAR AND THICKNESS-TWIST MODES IN AN OBLATE ELLIP...

引用

2012全国压电和声波理论及器件技术研讨会

作者： Hui-jing HE Jia-shi YANG Yi-hua HUANG Department of Mechanical and Materials Engineering University of Nebraska-Lincoln Department of Electronic and Communication Engineering Sun Yat-sen University

We study shear-horizontal motions of a piezoelectric ceramic cylinder with an oblate elliptical cross section and axial *** thickness-shear and thickness-twist vibration modes are *** modes show energy trapping,i.e.,the vibration is mainly confined near the thick,central region and decays to almost nothing near the *** results are useful for the understanding and design of contoured piezoelectric resonators for strong energy trapping.

关键词： Elliptic Resonator Energy trapping

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NON-SYMMETRIC DYNAMIC CHARACTERISTICS OF SPHERICALLY SYMMETRIC PIEZOELECTRIC SHELL

NON-SYMMETRIC DYNAMIC CHARACTERISTICS OF SPHERICALLY SYMMETR...

引用

2012全国压电和声波理论及器件技术研讨会

作者： Zu-guang YING Department of Mechanics School of Aeronautics and AstronauticsZhejiang University

Piezoelectric structures are applied broadly in engineering and their accurate analysis is *** shell structures have better electrical-mechanical coupling properties,but they have non-symmetric dynamic *** paper studies on the non-symmetric characteristics of spherically symmetric piezoelectric *** basic equations of piezoelectric spherical shell are given and converted into ordinary differential equations by using the Galerkin *** description in spherical coordinates with electrical-mechanical coupling induces the non-symmetric generalized stiffness *** asymmetric system eigenvalues differ from the corresponding singular values and the symmetrized system *** left and right eigenvectors of the asymmetric system have the cross-orthogonality relations which differ from the conventional symmetric system *** results illustrate the non-symmetric system eigenvalues and singular values,and their relative differences for different piezoelectric *** the non-symmetry of piezoelectric shells needs to be considered in the dynamic analysis.

关键词： Piezoelectric spherical shell Dynamic characteristics Non-symmetry

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ANALYSIS OF PIEZOELECTRIC LAMINATED PLATES USING THE LAYERWISE PLATE THEORY AND RADIAL BASIS FUNCTION COLLOCATION METHOD

ANALYSIS OF PIEZOELECTRIC LAMINATED PLATES USING THE LAYERWI...

引用

2012全国压电和声波理论及器件技术研讨会

作者： Yu YIN Lin-Quan YAO School of Mathematical Science Soochow University School of Urban Rail Transportation Soochow University

In this paper,a new formulation of piezoelectric laminated plates based on the linear piezoelectricity theory and the layerwise theory is *** linear piezoelectricity theory focuses on the coupling between mechanical deformations and the charge equations of *** layerwise theory is used for the mechanical displacement field and the potential *** equations of motion and boundary conditions are developed using an energy principle.A meshless collocation method based on the radial basis function is used to discrete the system *** proposed approach is good in that it can reflect the laminar stress effect,produce exactly electromechanical behaviors and accommodate multiple voltage inputs or *** examples verify the validity and precision of the proposed method.

关键词： Piezoelectric laminated plate Layerwise theory Meshless collocation method Radial basis function

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SPOT FORMATION AND ALIGNMENT OF SILVER NANOWIRES USING ULTRASONIC STAGE

SPOT FORMATION AND ALIGNMENT OF SILVER NANOWIRES USING ULTRA...

引用

2012全国压电和声波理论及器件技术研讨会

作者： Yu-jie ZHOU Jun-hui HU State Key Laboratory of Mechanics and Control of Mechanical Structures Nanjing University of Aeronautics and Astronautics

In this work,we report the use of a low-frequency circular ultrasonic stage to form a circular spot of silver nanowires(AgNWs) at the stage center and to align AgNWs on the stage surface *** manipulations are implemented within aAgNW suspension droplet at the center of the ultrasonic *** operating frequency of the ultrasonic stage is 21.3kHz and the AgNWs have diameter of 100 nm and length of 30 μm *** spot diameter and thickness are several hundred microns to several microns,*** the droplet dries out by natural evaporation without ultrasound,the spot and radial alignment have little change in the size and *** analyses show that the spot formation and radial alignment of AgNWs are caused by the acoustic streaming in the radial direction in the droplet.

关键词： Spot formation Radial alignment Silver nanowires Acoustic streaming Ultrasonic stage

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STUDY ON A NEW LINEAR ULTRASONIC MOTOR WITH BENDING PZT ELEMENTS

STUDY ON A NEW LINEAR ULTRASONIC MOTOR WITH BENDING PZT ELEM...

引用

2012全国压电和声波理论及器件技术研讨会

作者： Xiao-hui YANG Wei-shan CHEN Ying-xiang LIU Jun-kao LIU State Key Laboratory of Robotics and System Harbin Institute of Technology

A new linear ultrasonic motor using the 1st longitudinal and the 4th bending vibration modes of a bolt-clamped type transducer has been proposed and *** new motor with two feet employed only the bending PZT *** groups of PZT elements are clamped between the two exponential shape horns and the flange *** driving feet are located in the same side of the *** working principle of the proposed motor are *** the fabrication of a prototype,its admittance characteristics are measured using an impedance analyzer and the vibration modes are tested by a scanning laser Doppler ***,the mechanical ability of the prototype is tested.

关键词： Ultrasonic motor Bending PZT elements Admittance Vibration characteristics

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