The present work investigates the scattering problem of plane SH wave in piezoelectric media with an interface circular *** using the Hankel functions and the expansion method of wave functions,the basic Green's f...
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The present work investigates the scattering problem of plane SH wave in piezoelectric media with an interface circular *** using the Hankel functions and the expansion method of wave functions,the basic Green's function solutions are ***,based on the interface continuity conditions,the integral equations of the scattering problem with the interface circular cavity are *** solving the integral equations,the dynamic stress around the hole is *** numerical examples are given to show the influence of the material parameters upon dynamic concentration *** is found that the change of the material parameters has a great influence on the dynamic stress concentration.
In this study,we present the different properties of beveling process,equivalent series resistance(ESR),temperature curves,temperature hysteresis,and shock resistance of different sizes of X- and Z'-elongated rect...
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In this study,we present the different properties of beveling process,equivalent series resistance(ESR),temperature curves,temperature hysteresis,and shock resistance of different sizes of X- and Z'-elongated rectangular AT-cut quartz *** results show the Z'-elongated quartz strip mounted on the two width sides has better performance in temperature hysteresis and shock *** for mode coupling,beveling process,and temperature curve,X- and Z'-elongated rectangular AT-cut quartz plate have their respective properties.
The anti-plane vibration of a quartz plate having an additional partial non-uniform mass layer on its upper surface is solved by ignoring the effect of small c in comparison with other elastic *** on the Fourier sine ...
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The anti-plane vibration of a quartz plate having an additional partial non-uniform mass layer on its upper surface is solved by ignoring the effect of small c in comparison with other elastic *** on the Fourier sine and cosine series solution,the convergence and verification are *** frequency spectrum,as well as the energy trapping,are *** with the homogeneous mass layer,the non-homogeneous layer with greater inertia leads to more modes trapped under the same *** the results obtained give theoretical guidance for physical phenomena explanations of layer properties in quartz crystal microbalance.
Piezoelectric element is the core component of ultrasonic motor utilized to transform electric energy into mechanical *** the exciting mode of piezoelectric element has a significant influence on the output characteri...
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Piezoelectric element is the core component of ultrasonic motor utilized to transform electric energy into mechanical *** the exciting mode of piezoelectric element has a significant influence on the output characteristics of ultrasonic *** vibration characteristics of plate-attached cylindrical rotary-linear ultrasonic motor with driving screw thread pair were analyzed *** detail,the influence of exciting position and length of PZT plates on the output performance of stator were *** confirmation was accomplished to theoretical results by finite element method.A plate-attached cylindrical rotary-linear ultrasonic motor prototype was *** on the virtual instrument technology,a testing system was realized and the prototype motor was tested.
The unidirectional transmission of Lamb wave in low-frequency domains is realized by graded grating phononic crystal slabs This exotic phenomenon stems from the threshold frequency of the fundamental antisymmetric Lam...
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The unidirectional transmission of Lamb wave in low-frequency domains is realized by graded grating phononic crystal slabs This exotic phenomenon stems from the threshold frequency of the fundamental antisymmetric Lamb mode conversion to the fundamental symmetric Lamb mode is different at the different locations of the acoustic *** should be potentially significant in helping design chip-scale directional phononic devices.
The basic equations of a type of ellaptical PDEs and the coordinate transformation technique are provided in this *** on the idea of image technique,the fundamental solutions are reconstructed for the symmetrical prob...
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The basic equations of a type of ellaptical PDEs and the coordinate transformation technique are provided in this *** on the idea of image technique,the fundamental solutions are reconstructed for the symmetrical problems to reduce the computational *** the numerical experiments,it is seen that the results in this paper have good accuracy and high *** with coordinate transformation technique can solve more elliptical PDES compared with the classic field of harmonic and biharmonic *** particular,the programming,date preparing and the linear equations for computing can be greatly reduced by using the reconstructed fundamental solutions with image technique.
This paper has presented a S-type linear piezoelectric motor based on the principle of inchworm,and analyzed the structure and operation principle of the *** on the analysis of the actuator's stator,the output per...
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This paper has presented a S-type linear piezoelectric motor based on the principle of inchworm,and analyzed the structure and operation principle of the *** on the analysis of the actuator's stator,the output performance of proposed actuator is *** results show that the output displacement of the actuator is stable,and the displacement for single step is 0.625 μm when the actuating voltage is 100 *** velocity and acceleration properties of the linear actuator are *** to the testing results,the dynamic response performance of the actuator is analyzed *** experimental results show that the proposed piezoelectric linear actuator has good dynamic performance and stability motion.
According to Berktay the far-field solution of parametric array,self-demodulatory sound pressure is proportional to squared of envelope function to the second derivative of the *** excitation input signals of parametr...
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According to Berktay the far-field solution of parametric array,self-demodulatory sound pressure is proportional to squared of envelope function to the second derivative of the *** excitation input signals of parametric array were designed and analyzed.A parameter array is measured under the different excitation *** results show that:(1)When the input signals is single-sideband amphtude modulatory signal the harmonic distortion of the sound field is relatively small compared to the double sideband amphtude modulated signal and the difference frequency wave acoustic source level is higher;(2) The difference frequency wave source level will increase rapidly with increase of input power of the parametric *** too much power may cause the power amplifier to produce nonlinear,thus the harmonic amphtude increase and the conversion efficiency will be lower.
This paper is about the analysis and design of a longitudinal piezoelectric vibration exciter,which is required to produce forces that are more than 10 N from 100 Hz to *** device consists of three main parts- the rea...
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This paper is about the analysis and design of a longitudinal piezoelectric vibration exciter,which is required to produce forces that are more than 10 N from 100 Hz to *** device consists of three main parts- the rear plate,driving element and working *** Circuit Method(ECM in short) and Finite Element Analysis(FEA in short) are used to choose the material and size of each *** analyzing the frequency-force spectra of FEA models with different sizes and working loads,the structure of the longitudinal piezoelectric vibration exciter is finally *** from fulfilling the basic requirement,it can also be effectively used at frequencies more than 2 kHz.
The mechanical resonant response of a solid depends on its shape,density,and elastic *** describe here the instrumentation and computational methods for obtaining and analyzing the resonant frequency of very small(0.0...
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The mechanical resonant response of a solid depends on its shape,density,and elastic *** describe here the instrumentation and computational methods for obtaining and analyzing the resonant frequency of very small(0.001 cm3)samples,and provide examples to demonstrate the utilization of the technique.A new material type with six independent elastic constants are formulated and tested with the *** study will leads to expansion of the software capability for the testing of novel materials.
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