Pub Date : 2015-10-01DOI: 10.1109/SPAWDA.2015.7364544
Binglei Wang, Long Zhang, Yue Xiao
With piezoelectric layers attached, the electrostatically actuated microbeam-based MEMS (Micro-Electro-Mechanical Systems) is modelled to study the pull-in instability based on a modified couple stress theory. The nonlinear differential governing equation and boundary conditions of the beam are derived by using Hamilton's principle. The results show that the piezoelectric layers can decrease the pull-in voltage by only applying very small voltage on the MEMS. The study may be helpful to characterize the mechanical and electrostatic properties of small size MEMS, or guide the design of microbeam-based devices for a wide range of potential applications.
{"title":"Effect of piezoelectric layers on the size-dependent pull-in instability analysis of electrostatically actuated MEMS","authors":"Binglei Wang, Long Zhang, Yue Xiao","doi":"10.1109/SPAWDA.2015.7364544","DOIUrl":"https://doi.org/10.1109/SPAWDA.2015.7364544","url":null,"abstract":"With piezoelectric layers attached, the electrostatically actuated microbeam-based MEMS (Micro-Electro-Mechanical Systems) is modelled to study the pull-in instability based on a modified couple stress theory. The nonlinear differential governing equation and boundary conditions of the beam are derived by using Hamilton's principle. The results show that the piezoelectric layers can decrease the pull-in voltage by only applying very small voltage on the MEMS. The study may be helpful to characterize the mechanical and electrostatic properties of small size MEMS, or guide the design of microbeam-based devices for a wide range of potential applications.","PeriodicalId":205914,"journal":{"name":"2015 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications (SPAWDA)","volume":"40 5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126088273","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 : 2015-10-01DOI: 10.1109/SPAWDA.2015.7364463
Chao Zhang, Shou-guo Yan, Bi-xing Zhang
The aim of this paper is to investigate propagating and scattering characteristics of guided wave in the layered plate with defects and to determine whether it is possible to detect, locate and classify the defects by monitoring the echo signals. First, it is considered a two-layered plate consist of steel and aluminum. The guided wave is calculated and analyzed by the transfer matrix and Finite Element Method (FEM) in the layered plate without defects respectively. It is proved the reliability of FEM by the numerical simulation results. Then, FEM is used to simulate the propagation and scattering of the guided wave in the plate. It is found that the size and position of the defect can be obtained by monitoring the reflection coefficient.
{"title":"Scattering of guided wave on a defect in layered plate","authors":"Chao Zhang, Shou-guo Yan, Bi-xing Zhang","doi":"10.1109/SPAWDA.2015.7364463","DOIUrl":"https://doi.org/10.1109/SPAWDA.2015.7364463","url":null,"abstract":"The aim of this paper is to investigate propagating and scattering characteristics of guided wave in the layered plate with defects and to determine whether it is possible to detect, locate and classify the defects by monitoring the echo signals. First, it is considered a two-layered plate consist of steel and aluminum. The guided wave is calculated and analyzed by the transfer matrix and Finite Element Method (FEM) in the layered plate without defects respectively. It is proved the reliability of FEM by the numerical simulation results. Then, FEM is used to simulate the propagation and scattering of the guided wave in the plate. It is found that the size and position of the defect can be obtained by monitoring the reflection coefficient.","PeriodicalId":205914,"journal":{"name":"2015 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications (SPAWDA)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133615775","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 : 2015-10-01DOI: 10.1109/SPAWDA.2015.7364465
Han Dong, Fang-fang Shi, Chao Kong, Bi-xing Zhang
In this paper, an ultrasonic phased array transducer which is designed as a Cylindrical Linear Phased Array (CLPA) is presented for imaging borehole wall. Firstly, the parameters of CPLA transducer are studied, optimized, and determined based on the numerical simulation of propagation and attenuation of the radiated acoustic wave of the transducer in the borehole medium. Then a CPLA transducer is designed and fabricated by high-temperature and high-pressure resistance wafer material and structure. Finally, the experiment study is conducted in a casing borehole by the CPLA transducer with the help of a phased array electrical system. The imaging of the casing borehole wall can reflect the basic information of the casing borehole wall in the experiment, which means that the CLPA transducer has good imaging capacity with high resolution.
{"title":"Design of an ultrasonic phased array transducer for imaging borehole wall","authors":"Han Dong, Fang-fang Shi, Chao Kong, Bi-xing Zhang","doi":"10.1109/SPAWDA.2015.7364465","DOIUrl":"https://doi.org/10.1109/SPAWDA.2015.7364465","url":null,"abstract":"In this paper, an ultrasonic phased array transducer which is designed as a Cylindrical Linear Phased Array (CLPA) is presented for imaging borehole wall. Firstly, the parameters of CPLA transducer are studied, optimized, and determined based on the numerical simulation of propagation and attenuation of the radiated acoustic wave of the transducer in the borehole medium. Then a CPLA transducer is designed and fabricated by high-temperature and high-pressure resistance wafer material and structure. Finally, the experiment study is conducted in a casing borehole by the CPLA transducer with the help of a phased array electrical system. The imaging of the casing borehole wall can reflect the basic information of the casing borehole wall in the experiment, which means that the CLPA transducer has good imaging capacity with high resolution.","PeriodicalId":205914,"journal":{"name":"2015 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications (SPAWDA)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133449256","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 : 2015-10-01DOI: 10.1109/SPAWDA.2015.7364444
D. Guo, Huiyu Li, H. Tzou
In this study, a tunable piezoelectric energy harvester manipulated by the light-activated shape memory polymer (LaSMP) is presented. A laminated cantilever beam consists of an elastic substrate, a light-activated shape memory polymer layer and piezoelectric patches is used as energy harvester. LaSMP layer could change its Young's modulus under the exposure of UV lights and harvester's natural frequency is regulated through the modulus change function of LaSMP. The tuned natural frequency of the harvester could match the external base excitation frequency and thus to achieve broadband resonance energy harvesting responses. For the first mode, the effective power increases from 1.18×10-4μW to 1.3×10-3μW when the natural frequency changes from 6.12Hz to 5.94Hz. For the second mode, the effective power increases from 0.003μW to 0.0304μW and for the third mode, it increases from 0.0086μW to 0.0879μW.
{"title":"A laser tunable piezoelectric energy harvester","authors":"D. Guo, Huiyu Li, H. Tzou","doi":"10.1109/SPAWDA.2015.7364444","DOIUrl":"https://doi.org/10.1109/SPAWDA.2015.7364444","url":null,"abstract":"In this study, a tunable piezoelectric energy harvester manipulated by the light-activated shape memory polymer (LaSMP) is presented. A laminated cantilever beam consists of an elastic substrate, a light-activated shape memory polymer layer and piezoelectric patches is used as energy harvester. LaSMP layer could change its Young's modulus under the exposure of UV lights and harvester's natural frequency is regulated through the modulus change function of LaSMP. The tuned natural frequency of the harvester could match the external base excitation frequency and thus to achieve broadband resonance energy harvesting responses. For the first mode, the effective power increases from 1.18×10-4μW to 1.3×10-3μW when the natural frequency changes from 6.12Hz to 5.94Hz. For the second mode, the effective power increases from 0.003μW to 0.0304μW and for the third mode, it increases from 0.0086μW to 0.0879μW.","PeriodicalId":205914,"journal":{"name":"2015 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications (SPAWDA)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129690255","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}
The screw-type ultrasonic motor was successfully used in fields of optical focusing system, medical instruments, and so on. In this paper, a cylindrical screw-type ultrasonic motor driven by six transducers is proposed. The motor mainly contains six fixed parts, twelve piezoelectric plates, six transducers, an elastomer and a screw shaft. The piezoelectric plates are bonded to the opposite outside surfaces of transducers and the d31 working mode is adopted. A traveling wave processing along circumferential direction of the elastomer is composited to drive screw shaft and the rotary-linear output motion is achieved without additional conversion mechanism. The motor is designed and its exciting mode is clarified in detail. The vibration performance of the motor is analyzed using Finite Element Method (FEM). The prototype is fabricated and tested. The testing results indicate that the vibration performance of the motor is in good agreement with the simulation results.
{"title":"Design and analysis of a cylindrical screw-type ultrasonic motor driven by six transducers","authors":"Ting-hai Cheng, Liang Wang, Mengfei Yin, Zhaoyang Song, Dong Zhu","doi":"10.1109/SPAWDA.2015.7364513","DOIUrl":"https://doi.org/10.1109/SPAWDA.2015.7364513","url":null,"abstract":"The screw-type ultrasonic motor was successfully used in fields of optical focusing system, medical instruments, and so on. In this paper, a cylindrical screw-type ultrasonic motor driven by six transducers is proposed. The motor mainly contains six fixed parts, twelve piezoelectric plates, six transducers, an elastomer and a screw shaft. The piezoelectric plates are bonded to the opposite outside surfaces of transducers and the d31 working mode is adopted. A traveling wave processing along circumferential direction of the elastomer is composited to drive screw shaft and the rotary-linear output motion is achieved without additional conversion mechanism. The motor is designed and its exciting mode is clarified in detail. The vibration performance of the motor is analyzed using Finite Element Method (FEM). The prototype is fabricated and tested. The testing results indicate that the vibration performance of the motor is in good agreement with the simulation results.","PeriodicalId":205914,"journal":{"name":"2015 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications (SPAWDA)","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114071833","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 : 2015-10-01DOI: 10.1109/SPAWDA.2015.7364467
Hai-qiang Liu, Sheng-lin Ma, Hui-yuan Wang, Qing-Ming Wang, L. Qin
In this paper, the electrode effects on mass sensitivity of GaN thin film bulk acoustic wave resonator (FBAR) sensors have been studied. The equation of electric impedance of FBARs with structure of mass sensitive layer/electrode/GaN/electrode has been derived by one dimensional transmission line model for frequency calculation. In the simulation, to produce shear mode acoustic 2μm GaN with 42.8° c-axis tilted angle was particularly chosen for liquid application; to investigate the effects of electrode on mass sensitivity, the acoustic characteristic impedance of electrode changes from 2.37×106Ω to 5.916×107Ω, and its thickness changes from 0 to 2000 nm. It was found that the thickness and acoustic characteristic impedance of electrode has great effects on the mass sensitivity; compared to non-electrode case, electrode with high acoustic characteristic impedance (higher than GaN) decreases mass sensitivity, while electrode with low acoustic characteristic impedance (lower than GaN) increases mass sensitivity, and maximum sensitivity can be achieved by the optimization of electrode material and thickness. The simulation results can be used for the design and application of GaN FBAR sensors.
{"title":"Electrode effects on mass sensitivity of GaN thin film bulk acoustic wave resonator sensors","authors":"Hai-qiang Liu, Sheng-lin Ma, Hui-yuan Wang, Qing-Ming Wang, L. Qin","doi":"10.1109/SPAWDA.2015.7364467","DOIUrl":"https://doi.org/10.1109/SPAWDA.2015.7364467","url":null,"abstract":"In this paper, the electrode effects on mass sensitivity of GaN thin film bulk acoustic wave resonator (FBAR) sensors have been studied. The equation of electric impedance of FBARs with structure of mass sensitive layer/electrode/GaN/electrode has been derived by one dimensional transmission line model for frequency calculation. In the simulation, to produce shear mode acoustic 2μm GaN with 42.8° c-axis tilted angle was particularly chosen for liquid application; to investigate the effects of electrode on mass sensitivity, the acoustic characteristic impedance of electrode changes from 2.37×106Ω to 5.916×107Ω, and its thickness changes from 0 to 2000 nm. It was found that the thickness and acoustic characteristic impedance of electrode has great effects on the mass sensitivity; compared to non-electrode case, electrode with high acoustic characteristic impedance (higher than GaN) decreases mass sensitivity, while electrode with low acoustic characteristic impedance (lower than GaN) increases mass sensitivity, and maximum sensitivity can be achieved by the optimization of electrode material and thickness. The simulation results can be used for the design and application of GaN FBAR sensors.","PeriodicalId":205914,"journal":{"name":"2015 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications (SPAWDA)","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123528839","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 : 2015-10-01DOI: 10.1109/SPAWDA.2015.7364464
Xiao-yu Wang, Haodong Wu, Ya-ying Hong, Hao Wang, De Zhang
Electrorheological fluid (ERF) is a smart material which can transpose from liquid-like state to solid-like state under the action of electric field, along with this process, the physical properties of the material will be changed like apparent viscosity, yield stress and acoustic impendence. In this paper, by means of an ultrasonic shear wave reflectometry method, the transformation laws of the resistive components R and the reactive components X of the complex dynamic shear impedance, the storage modulus G1, the loss modulus G2, the sound velocity v are supplied.
{"title":"The shear wave properties of ERF","authors":"Xiao-yu Wang, Haodong Wu, Ya-ying Hong, Hao Wang, De Zhang","doi":"10.1109/SPAWDA.2015.7364464","DOIUrl":"https://doi.org/10.1109/SPAWDA.2015.7364464","url":null,"abstract":"Electrorheological fluid (ERF) is a smart material which can transpose from liquid-like state to solid-like state under the action of electric field, along with this process, the physical properties of the material will be changed like apparent viscosity, yield stress and acoustic impendence. In this paper, by means of an ultrasonic shear wave reflectometry method, the transformation laws of the resistive components R and the reactive components X of the complex dynamic shear impedance, the storage modulus G1, the loss modulus G2, the sound velocity v are supplied.","PeriodicalId":205914,"journal":{"name":"2015 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications (SPAWDA)","volume":"252 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116665939","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 : 2015-10-01DOI: 10.1109/SPAWDA.2015.7364490
Kai Zhang
There are many advantages of broadband transducers, such as reducing of signal distortion, widening the security about information transmission, reducing the ratio of false codes. The use of eight 33 mode single crystal pieces, a thin light beryllium alloy head mass and a thick heavy tungsten alloy tail mass can expand the bandwidth of the middle-frequency transducer. The one-fourth finite element model of transducer was set up with ANSYS software and the structure of the transducer was optimized. A final transducer was designed, fabricated and measured, and its longitudinal size is about 21mm. The bandwidth of the transducer is 17 kHz-120 kHz, in which the ripple of the transmitting voltage response does not exceed ±5dB. There are several conclusions from the research: the bandwidth of tonpilz transducers can be expanded by the use of single crystal pieces, beryllium alloy head mass and tungsten alloy tail mass; and it gives a method to achieve the broad-band projecting performance of middle-frequency transducers.
{"title":"The study of 33 mode single crystal longitudinal transducer","authors":"Kai Zhang","doi":"10.1109/SPAWDA.2015.7364490","DOIUrl":"https://doi.org/10.1109/SPAWDA.2015.7364490","url":null,"abstract":"There are many advantages of broadband transducers, such as reducing of signal distortion, widening the security about information transmission, reducing the ratio of false codes. The use of eight 33 mode single crystal pieces, a thin light beryllium alloy head mass and a thick heavy tungsten alloy tail mass can expand the bandwidth of the middle-frequency transducer. The one-fourth finite element model of transducer was set up with ANSYS software and the structure of the transducer was optimized. A final transducer was designed, fabricated and measured, and its longitudinal size is about 21mm. The bandwidth of the transducer is 17 kHz-120 kHz, in which the ripple of the transmitting voltage response does not exceed ±5dB. There are several conclusions from the research: the bandwidth of tonpilz transducers can be expanded by the use of single crystal pieces, beryllium alloy head mass and tungsten alloy tail mass; and it gives a method to achieve the broad-band projecting performance of middle-frequency transducers.","PeriodicalId":205914,"journal":{"name":"2015 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications (SPAWDA)","volume":"164 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121746650","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 : 2015-10-01DOI: 10.1109/SPAWDA.2015.7364502
Kun-lun Deng, Hong-lang Li, W. Luo, Yabing Ke, S. He
Carbon black combined PDMS is a promising material for laser ultrasonic inspection but the generated ultrasound field characteristics have not been studied. To obtain the wave field generated by laser in the polymer material, thermo-elasticity model was adopted, a 2D axial symmetry finite element model is built and the physics and parameters are set as actual situation for ultrasonic wave generation. The generated acoustic wave modes and the transient wave field are calculated. The multi-mode wave field and the directivity and intensity of generated ultrasonic are obtained. Theoretical calculation results show that the polymer combined carbon black material has a great prospect in nondestructive detecting applications.
{"title":"Finite element modeling of laser generated ultrasound in black PDMS materials","authors":"Kun-lun Deng, Hong-lang Li, W. Luo, Yabing Ke, S. He","doi":"10.1109/SPAWDA.2015.7364502","DOIUrl":"https://doi.org/10.1109/SPAWDA.2015.7364502","url":null,"abstract":"Carbon black combined PDMS is a promising material for laser ultrasonic inspection but the generated ultrasound field characteristics have not been studied. To obtain the wave field generated by laser in the polymer material, thermo-elasticity model was adopted, a 2D axial symmetry finite element model is built and the physics and parameters are set as actual situation for ultrasonic wave generation. The generated acoustic wave modes and the transient wave field are calculated. The multi-mode wave field and the directivity and intensity of generated ultrasonic are obtained. Theoretical calculation results show that the polymer combined carbon black material has a great prospect in nondestructive detecting applications.","PeriodicalId":205914,"journal":{"name":"2015 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications (SPAWDA)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124053541","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 : 2015-10-01DOI: 10.1109/SPAWDA.2015.7364468
Long-xiang Dai, Shan Jiang, Peigang Li, Hongping Hu
A tube phononic crystal (PC) model arrayed periodically by metal and piezoelectric segments is proposed. Each piezoelectric segment consists of two piezoelectric layers connected in parallel independently by a resonant shunting circuit. The inductor and a piezoelectric equivalent capacitor form an inductor-capacitor oscillator. Coupling vibration of extension and flexure of the thin periodic tube structure is studied by the classical shell theory and linear piezoelectric theory. Precise electric field method and transfer matrix method are applied to solve band gap structures and transmission factor curves. Two locally resonant band gaps and one Bragg band gap are distinguished. Some interesting phenomena of interaction between two locally resonant bands are found. The effects of circuit inductance, material parameters of the tube PC on these three band gaps are investigated.
{"title":"Transmission of radial vibration along piezoelectric tubular phononic crystal in parallel with resonant shunting circuits","authors":"Long-xiang Dai, Shan Jiang, Peigang Li, Hongping Hu","doi":"10.1109/SPAWDA.2015.7364468","DOIUrl":"https://doi.org/10.1109/SPAWDA.2015.7364468","url":null,"abstract":"A tube phononic crystal (PC) model arrayed periodically by metal and piezoelectric segments is proposed. Each piezoelectric segment consists of two piezoelectric layers connected in parallel independently by a resonant shunting circuit. The inductor and a piezoelectric equivalent capacitor form an inductor-capacitor oscillator. Coupling vibration of extension and flexure of the thin periodic tube structure is studied by the classical shell theory and linear piezoelectric theory. Precise electric field method and transfer matrix method are applied to solve band gap structures and transmission factor curves. Two locally resonant band gaps and one Bragg band gap are distinguished. Some interesting phenomena of interaction between two locally resonant bands are found. The effects of circuit inductance, material parameters of the tube PC on these three band gaps are investigated.","PeriodicalId":205914,"journal":{"name":"2015 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications (SPAWDA)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126498662","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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