Pub Date : 2019-11-01DOI: 10.1109/SPAWDA48812.2019.9019276
Sheng-quan Zhao, Zengxin Wu, Dejin Huang, Lijun Yi, Jianke Du, Ji Wang
The free vibrations of an elastic cylinder with open slits are analyzed with the Rayleigh-Ritz method. The analytical procedure is based on the formulation in cylindrical coordinates with the three-dimensional linear elasticity. For the formulation and calculation of kinetic and strain energies, the cylinder is divided into upper and lower parts with the depth of the slit. Using the Rayleigh-Ritz method, the eigenvalue equation is obtained for the two parts with different displacements in Chebyshev polynomials. Utilizing the displacement continuity conditions at the interface between, the eigenvalue equations for the cylinder is obtained. A convergence check and comparison with the FEM results demonstrate the validity and accuracy of the present method.
{"title":"A Vibration Analysis of a Cylinder with Slits","authors":"Sheng-quan Zhao, Zengxin Wu, Dejin Huang, Lijun Yi, Jianke Du, Ji Wang","doi":"10.1109/SPAWDA48812.2019.9019276","DOIUrl":"https://doi.org/10.1109/SPAWDA48812.2019.9019276","url":null,"abstract":"The free vibrations of an elastic cylinder with open slits are analyzed with the Rayleigh-Ritz method. The analytical procedure is based on the formulation in cylindrical coordinates with the three-dimensional linear elasticity. For the formulation and calculation of kinetic and strain energies, the cylinder is divided into upper and lower parts with the depth of the slit. Using the Rayleigh-Ritz method, the eigenvalue equation is obtained for the two parts with different displacements in Chebyshev polynomials. Utilizing the displacement continuity conditions at the interface between, the eigenvalue equations for the cylinder is obtained. A convergence check and comparison with the FEM results demonstrate the validity and accuracy of the present method.","PeriodicalId":208819,"journal":{"name":"2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA)","volume":"169 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133926793","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}
Pub Date : 2019-11-01DOI: 10.1109/SPAWDA48812.2019.9019266
Hao Jiang, Bin Wang, Z. Qian
In this paper, we propose a coupling technique of modified boundary element method (MBEM) and method of fundamental solutions (MFS) for solving the forward scattering problem of Love waves. First, the boundaries and interfaces of the intact structure is discretized for BEM formulation. To suppress spurious reflections brought about by model truncation, the far-field behaviors of guided waves are incorporated into the basic BEM equations as the modification items. Secondly, the scattered wave field, due to surface or internal cavities, is modeled as radiated from a series of "virtual point sources", which are placed within the actual flaw regions. The strengths of these sources are determined by free-traction conditions of total wave field on the cavity surface, which forms an MFS configuration. The MBEM and MFS parts are combined to form a total matrix, and the near-field displacements, far-field scattering coefficients for propagating modes, as well as the source strengths are solved simultaneously.
{"title":"The Application of the Method of Fundamental Solutions to Solve Ultrasonic Guided Wave Scattering","authors":"Hao Jiang, Bin Wang, Z. Qian","doi":"10.1109/SPAWDA48812.2019.9019266","DOIUrl":"https://doi.org/10.1109/SPAWDA48812.2019.9019266","url":null,"abstract":"In this paper, we propose a coupling technique of modified boundary element method (MBEM) and method of fundamental solutions (MFS) for solving the forward scattering problem of Love waves. First, the boundaries and interfaces of the intact structure is discretized for BEM formulation. To suppress spurious reflections brought about by model truncation, the far-field behaviors of guided waves are incorporated into the basic BEM equations as the modification items. Secondly, the scattered wave field, due to surface or internal cavities, is modeled as radiated from a series of \"virtual point sources\", which are placed within the actual flaw regions. The strengths of these sources are determined by free-traction conditions of total wave field on the cavity surface, which forms an MFS configuration. The MBEM and MFS parts are combined to form a total matrix, and the near-field displacements, far-field scattering coefficients for propagating modes, as well as the source strengths are solved simultaneously.","PeriodicalId":208819,"journal":{"name":"2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132146760","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}
Pub Date : 2019-11-01DOI: 10.1109/SPAWDA48812.2019.9019288
Guang-ying Yang, Minghua Zhang, J. Lou, Meng-kai Lu, Ji Wang, Jianke Du
In this paper, the propagation of surface acoustic waves in a periodic structure which consists of periodic domain inversion piezoelectric substrate covered by a functionally graded layer is studied. We calculated the band structures using the finite element method. The effects of the gradient variation of material constants on the band structures are discussed in detail. Numerical analysis shows that the band gap shifts to lower frequency and the bandwidth decreases with increase of the positive gradient factor β, whereas the band gap shifts to higher frequency and the bandwidth increase with increase of the negative gradient factor β. Besides, the thickness of the layer also has a significant effect on the first band gap.
{"title":"The Influence of Functionally Graded Layer on the Band Structures of One-Dimensional Phononic Crystals","authors":"Guang-ying Yang, Minghua Zhang, J. Lou, Meng-kai Lu, Ji Wang, Jianke Du","doi":"10.1109/SPAWDA48812.2019.9019288","DOIUrl":"https://doi.org/10.1109/SPAWDA48812.2019.9019288","url":null,"abstract":"In this paper, the propagation of surface acoustic waves in a periodic structure which consists of periodic domain inversion piezoelectric substrate covered by a functionally graded layer is studied. We calculated the band structures using the finite element method. The effects of the gradient variation of material constants on the band structures are discussed in detail. Numerical analysis shows that the band gap shifts to lower frequency and the bandwidth decreases with increase of the positive gradient factor β, whereas the band gap shifts to higher frequency and the bandwidth increase with increase of the negative gradient factor β. Besides, the thickness of the layer also has a significant effect on the first band gap.","PeriodicalId":208819,"journal":{"name":"2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA)","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132443987","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}
Pub Date : 2019-11-01DOI: 10.1109/SPAWDA48812.2019.9019270
Yu-xiang Dai, Shou-guo Yan, Bi-xing Zhang
This paper studies the beam steering behavior of linear phased arrays in solid and analyzes the influence of the SV waves on the beam steering performance of P waves. The analytical formulas of the beam steering field of P waves in the far field in solid are derived. The influence of array design parameters on the beam steering performance of P waves is discussed in detail by numerical simulation. The results show that the grating lobes of SV waves can be eliminated by selecting the inter-element spacing less than a critical value, and the main lobes of that can be eliminated when P waves are steered at a high steering angle larger than a critical value. The analytical expression of the critical inter-element spacing and steering angle are also obtained. In addition, a larger element size can provide a higher energy of P waves relative to SV waves.
{"title":"Ultrosonic Beam Steering Behavior of Linear Phased Arrays in Solid","authors":"Yu-xiang Dai, Shou-guo Yan, Bi-xing Zhang","doi":"10.1109/SPAWDA48812.2019.9019270","DOIUrl":"https://doi.org/10.1109/SPAWDA48812.2019.9019270","url":null,"abstract":"This paper studies the beam steering behavior of linear phased arrays in solid and analyzes the influence of the SV waves on the beam steering performance of P waves. The analytical formulas of the beam steering field of P waves in the far field in solid are derived. The influence of array design parameters on the beam steering performance of P waves is discussed in detail by numerical simulation. The results show that the grating lobes of SV waves can be eliminated by selecting the inter-element spacing less than a critical value, and the main lobes of that can be eliminated when P waves are steered at a high steering angle larger than a critical value. The analytical expression of the critical inter-element spacing and steering angle are also obtained. In addition, a larger element size can provide a higher energy of P waves relative to SV waves.","PeriodicalId":208819,"journal":{"name":"2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA)","volume":"198 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132713911","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}
Pub Date : 2019-11-01DOI: 10.1109/SPAWDA48812.2019.9019303
Yu-mei Ye, Jiangong Yu
Evanescent waves are widely used in non-destructive evaluation to determine the shape and size of defects,as a result, it have become the focus of research. It is crucial to study the modal and dispersion relations of evanescent waves described by complex roots. However, it is relatively difficult to solve the roots of evanescent modes, especially for structures such as anisotropy and composites. In this paper, using the Legendre orthogonal polynomial method (LOPM), the guided wave characteristics of multilayer anisotropic elastic plates are studied by transforming the solution process into solving the eigenvalue problem of a matrix. Detailed formulas and Lamb wave dispersion diagrams are presented. The validity of LOPM is verified by comparing with the published data. Furthermore, the dispersion curves of the three-dimensional complex solutions are further drawn, and the relationship between the modes of complex and pure imaginary solutions is deeply discussed. Meanwhile, the influence of different thickness ratios on the dispersion characteristics of evanescent guided waves is also studied. Some instructive conclusions are obtained, which can guide the non-destructive testing of composite structures using evanescent waves.
{"title":"Evanescent Lamb Wave in Laminated Composites Elastic Plates","authors":"Yu-mei Ye, Jiangong Yu","doi":"10.1109/SPAWDA48812.2019.9019303","DOIUrl":"https://doi.org/10.1109/SPAWDA48812.2019.9019303","url":null,"abstract":"Evanescent waves are widely used in non-destructive evaluation to determine the shape and size of defects,as a result, it have become the focus of research. It is crucial to study the modal and dispersion relations of evanescent waves described by complex roots. However, it is relatively difficult to solve the roots of evanescent modes, especially for structures such as anisotropy and composites. In this paper, using the Legendre orthogonal polynomial method (LOPM), the guided wave characteristics of multilayer anisotropic elastic plates are studied by transforming the solution process into solving the eigenvalue problem of a matrix. Detailed formulas and Lamb wave dispersion diagrams are presented. The validity of LOPM is verified by comparing with the published data. Furthermore, the dispersion curves of the three-dimensional complex solutions are further drawn, and the relationship between the modes of complex and pure imaginary solutions is deeply discussed. Meanwhile, the influence of different thickness ratios on the dispersion characteristics of evanescent guided waves is also studied. Some instructive conclusions are obtained, which can guide the non-destructive testing of composite structures using evanescent waves.","PeriodicalId":208819,"journal":{"name":"2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA)","volume":"145 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128917062","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}
Pub Date : 2019-11-01DOI: 10.1109/SPAWDA48812.2019.9019308
Jie Zhao, Y. Wang, Shan-shan Dong, Miao Ruan, Hao Wu
Theoretical and numerical calculationsare performed to study the interaction of high nonlinear solitary waves(HNSWs) in one-dimensional particle chains and viscoelastic infinite plate. We use theRunge-kutta method to solve thecompletely coupled differential equation systemand obtain the numerical solutions of velocity and displacement of each particle in the particle chains. By comparing the time difference and energy ratio of reflected wave and incident wave, it is found that solitary waves is sensitive to the thickness and viscosity coefficient of viscoelastic infinite plate in a certain range.The results provide theoretical basis for non-destructive testing(NDT) technology based on nonlinear solitary waves.
{"title":"Interaction of high nonlinear solitary waves with Viscoelastic infinite plate","authors":"Jie Zhao, Y. Wang, Shan-shan Dong, Miao Ruan, Hao Wu","doi":"10.1109/SPAWDA48812.2019.9019308","DOIUrl":"https://doi.org/10.1109/SPAWDA48812.2019.9019308","url":null,"abstract":"Theoretical and numerical calculationsare performed to study the interaction of high nonlinear solitary waves(HNSWs) in one-dimensional particle chains and viscoelastic infinite plate. We use theRunge-kutta method to solve thecompletely coupled differential equation systemand obtain the numerical solutions of velocity and displacement of each particle in the particle chains. By comparing the time difference and energy ratio of reflected wave and incident wave, it is found that solitary waves is sensitive to the thickness and viscosity coefficient of viscoelastic infinite plate in a certain range.The results provide theoretical basis for non-destructive testing(NDT) technology based on nonlinear solitary waves.","PeriodicalId":208819,"journal":{"name":"2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131328253","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}
Pub Date : 2019-11-01DOI: 10.1109/SPAWDA48812.2019.9019299
Junhua Xiao, Mengyu Su, G. Feng
The Gurtin-Murdoch surface model is extended to theoretically study the fracture characteristics of the one-dimensional hexagonal piezoelectric quasicrystals with nano-defects. The complex electrostatic theory and the conformal mapping method are used to study the type III fracture problem of the one-dimensional hexagonal piezoelectric quasicrystals containing cracked nano-elliptical hole. An analytical expression of the electrostatic field intensity factors is obtained. The influences of defect size, relative crack length and coupling coefficient on the dimensionless stress intensity factor and the electric displacement field intensity factor are discussed. The results show that the dimensionless stress intensity factor and the electric displacement field intensity factor are obviously size dependent when the defect is at the nanometer scale. Geometric parameters of the defects and material parameters have a significant impact on the dimensionless electrostatic field intensity factors.
{"title":"Micromechanics of Nano-Defects in One-Dimensional Hexagonal Piezoelectric Quasicrystals","authors":"Junhua Xiao, Mengyu Su, G. Feng","doi":"10.1109/SPAWDA48812.2019.9019299","DOIUrl":"https://doi.org/10.1109/SPAWDA48812.2019.9019299","url":null,"abstract":"The Gurtin-Murdoch surface model is extended to theoretically study the fracture characteristics of the one-dimensional hexagonal piezoelectric quasicrystals with nano-defects. The complex electrostatic theory and the conformal mapping method are used to study the type III fracture problem of the one-dimensional hexagonal piezoelectric quasicrystals containing cracked nano-elliptical hole. An analytical expression of the electrostatic field intensity factors is obtained. The influences of defect size, relative crack length and coupling coefficient on the dimensionless stress intensity factor and the electric displacement field intensity factor are discussed. The results show that the dimensionless stress intensity factor and the electric displacement field intensity factor are obviously size dependent when the defect is at the nanometer scale. Geometric parameters of the defects and material parameters have a significant impact on the dimensionless electrostatic field intensity factors.","PeriodicalId":208819,"journal":{"name":"2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA)","volume":"139 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115598402","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}
Pub Date : 2019-11-01DOI: 10.1109/SPAWDA48812.2019.9019330
Yan Wang, Xiao-qing Liu, Shu-lin Shang, Xun Xu
3D-finite element method (3D-FEM) is used to investigate the characteristics of Rayleigh wave devices based on GO(Graphene Oxide)/SiO2/IDT(inter-digital transducer)/128° YX-LiNbO3 structures, including the phase velocity vp, electromechanical coupling coefficient k2, and gas sensing properties. The results show that the GO layersimprove the characteristics of the Rayleigh wave devices, that is, vp andk2 are increased by the introduction of GO films. And thek2of 9.32% associated with phase velocity of 4517m/s have obtained as hs/λ=0.01 and hGO=0.5μm, which are higher than that of GO free Rayleigh wave device. Meanwhile, the gas sensing sensitivity of theRayleigh wave sensor is also enhanced by GO layers. Therefore, GO is an ideal material for constructing SAW sensors for widespread applications.
{"title":"Fem Modeling Rayleigh Wave Sensors Based on GO/SiO2/128° YX-LiNbO3 Structures","authors":"Yan Wang, Xiao-qing Liu, Shu-lin Shang, Xun Xu","doi":"10.1109/SPAWDA48812.2019.9019330","DOIUrl":"https://doi.org/10.1109/SPAWDA48812.2019.9019330","url":null,"abstract":"3D-finite element method (3D-FEM) is used to investigate the characteristics of Rayleigh wave devices based on GO(Graphene Oxide)/SiO<inf>2</inf>/IDT(inter-digital transducer)/128° YX-LiNbO<inf>3</inf> structures, including the phase velocity v<inf>p</inf>, electromechanical coupling coefficient k<sup>2</sup>, and gas sensing properties. The results show that the GO layersimprove the characteristics of the Rayleigh wave devices, that is, v<inf>p</inf> andk<sup>2</sup> are increased by the introduction of GO films. And thek<sup>2</sup>of 9.32% associated with phase velocity of 4517m/s have obtained as h<inf>s</inf>/λ=0.01 and h<inf>GO</inf>=0.5μm, which are higher than that of GO free Rayleigh wave device. Meanwhile, the gas sensing sensitivity of theRayleigh wave sensor is also enhanced by GO layers. Therefore, GO is an ideal material for constructing SAW sensors for widespread applications.","PeriodicalId":208819,"journal":{"name":"2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA)","volume":"213 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114844353","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}
Pub Date : 2019-11-01DOI: 10.1109/SPAWDA48812.2019.9019326
Liang Fang, Zhihua Guo, Qing Wang, Bin Ju
For simulation analysis of piezoelectric device with a driver circuit, this paper proposes a hybrid simulation scheme with a combination of multi-physics field finite element simulation and circuit analysis software. Taking the drive analysis of piezoelectric transformer as an example, the paper firstly uses the circuit analysis software Multisim to carry out the actuation simulation with the equivalent circuit model. Then, the modal analysis of the piezoelectric transformer is carried out in Comsol, and the driving circuit is imported by the SPICE netlist for hybrid simulation. Finally, the paper introduces the temperature model of the piezoelectric parameter d33 and analyzes the effect of temperature changes on the driving performance of the piezoelectric transformer. Comparing the simulation data, the results of the hybrid simulation are more accurate and more in line with the actual working process of the piezoelectric transformer.
{"title":"A Hybrid Simulation Method for Actuation of Piezoelectric Transformer Combining Circuit and Finite Element Analysis","authors":"Liang Fang, Zhihua Guo, Qing Wang, Bin Ju","doi":"10.1109/SPAWDA48812.2019.9019326","DOIUrl":"https://doi.org/10.1109/SPAWDA48812.2019.9019326","url":null,"abstract":"For simulation analysis of piezoelectric device with a driver circuit, this paper proposes a hybrid simulation scheme with a combination of multi-physics field finite element simulation and circuit analysis software. Taking the drive analysis of piezoelectric transformer as an example, the paper firstly uses the circuit analysis software Multisim to carry out the actuation simulation with the equivalent circuit model. Then, the modal analysis of the piezoelectric transformer is carried out in Comsol, and the driving circuit is imported by the SPICE netlist for hybrid simulation. Finally, the paper introduces the temperature model of the piezoelectric parameter d33 and analyzes the effect of temperature changes on the driving performance of the piezoelectric transformer. Comparing the simulation data, the results of the hybrid simulation are more accurate and more in line with the actual working process of the piezoelectric transformer.","PeriodicalId":208819,"journal":{"name":"2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA)","volume":"30 11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123795145","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}
Pub Date : 2019-11-01DOI: 10.1109/SPAWDA48812.2019.9019247
Simiao Hu, Yi-feng Hu, X. Cao, S. Tian
In this paper, we investigate the propagation of generalized Rayleigh waves in a piezoelectric layered structure. Considering the gyroscopic effect, and based on the theory of elastic dynamics, the field control equations with rotation are established. Substituting the trial solutions of the mechanical displacement and the electrical potential into the boundary and continuity conditions, we obtain the dispersion equation when the free surface is electrically open and electrically shorted, respectively. Numerical examples show that frequency varies approximately linear with the angular rate, and the change of frequency is more sensitive for long waves. The results provide a theoretical basis for designing SAW gyroscopes.
{"title":"Gyro Effect on Surface Acoustic Wave Propagation in A Piezoelectric Layered Structure","authors":"Simiao Hu, Yi-feng Hu, X. Cao, S. Tian","doi":"10.1109/SPAWDA48812.2019.9019247","DOIUrl":"https://doi.org/10.1109/SPAWDA48812.2019.9019247","url":null,"abstract":"In this paper, we investigate the propagation of generalized Rayleigh waves in a piezoelectric layered structure. Considering the gyroscopic effect, and based on the theory of elastic dynamics, the field control equations with rotation are established. Substituting the trial solutions of the mechanical displacement and the electrical potential into the boundary and continuity conditions, we obtain the dispersion equation when the free surface is electrically open and electrically shorted, respectively. Numerical examples show that frequency varies approximately linear with the angular rate, and the change of frequency is more sensitive for long waves. The results provide a theoretical basis for designing SAW gyroscopes.","PeriodicalId":208819,"journal":{"name":"2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134228264","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}
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