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2016 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications (SPAWDA)最新文献

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Estimation of dynamic paramaters for viscoelastic materials by longitudinal vibration testing using pulse method 用脉冲法进行粘弹性材料纵向振动试验的动态参数估计
2016 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications (SPAWDA) Pub Date : 2016-10-01 DOI: 10.1109/SPAWDA.2016.7829946
H. Hou, Zheng-yu Wei
{"title":"Estimation of dynamic paramaters for viscoelastic materials by longitudinal vibration testing using pulse method","authors":"H. Hou, Zheng-yu Wei","doi":"10.1109/SPAWDA.2016.7829946","DOIUrl":"https://doi.org/10.1109/SPAWDA.2016.7829946","url":null,"abstract":"In this paper, two methods based on longitudinal vibration testing of a thin bar are proposed for measuring the dynamic parameters of the viscoelastic materials in a wide frequency region. First, an inverse method by FEM based on resonance measurement is presented, in which the measured response of longitudinal vibration is asymptotically approached by the forward calculated response from the finite element computation, then the dynamic parameters can be obtained. Second, an improved wave propagation measurements based on free end longitudinal vibration signal is described. In which the dynamic parameters in the frequency range of 1kHz to 5kHz are calculated from the vibration velocity ratio between the long bar and the short bar.","PeriodicalId":243839,"journal":{"name":"2016 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications (SPAWDA)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121985282","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
Investigation of directivity patterns of the sound radiated from circular and rectangular plates 圆形和矩形板辐射声的指向性模式研究
2016 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications (SPAWDA) Pub Date : 2016-10-01 DOI: 10.1109/SPAWDA.2016.7830032
Na Li, Xiping He, Xiuli Yan
{"title":"Investigation of directivity patterns of the sound radiated from circular and rectangular plates","authors":"Na Li, Xiping He, Xiuli Yan","doi":"10.1109/SPAWDA.2016.7830032","DOIUrl":"https://doi.org/10.1109/SPAWDA.2016.7830032","url":null,"abstract":"Two kinds of flat and stepped plates for ultrasonic radiators for the generation of high directional radiation in air are studied. The rectangular plate with free edges has no analytical solution. An approach for calculation of the directivity pattern of the sound radiated rectangular plate with free edges is developed based on the finite element method. It shows that the directivity pattern of the stepped plate radiator is better than that of the flat one. The configuration of the calculated directivity patterns of the radiators is quite similar to that of the tested one.","PeriodicalId":243839,"journal":{"name":"2016 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications (SPAWDA)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130111393","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
Study of a piezoelectric accelerometer based on d33 mode 基于d33模式的压电加速度计的研究
2016 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications (SPAWDA) Pub Date : 2016-10-01 DOI: 10.1109/SPAWDA.2016.7829957
Hui Zhou, Rui-hua Han, Mahui Xu, Hang Guo
{"title":"Study of a piezoelectric accelerometer based on d33 mode","authors":"Hui Zhou, Rui-hua Han, Mahui Xu, Hang Guo","doi":"10.1109/SPAWDA.2016.7829957","DOIUrl":"https://doi.org/10.1109/SPAWDA.2016.7829957","url":null,"abstract":"A piezoelectric accelerometer based on d33 mode was studied in this work. It is comprised of multiple cantilever beams to support a central seismic mass. The piezoelectric PZT thin films and interdigital (IDT) electrodes are designed to be deposited on the surface of beams. The PZT thin film was in-plane polarized and worked in d33 mode. The accelerometer was fundamentally analyzed and designed by using finite element method in ANSYS. Results showed that the presented micro piezoelectric accelerometer in d33 mode can offer higher voltage output over that in d31 mode, significantly improving the sensitivity without lowering the bandwidth.","PeriodicalId":243839,"journal":{"name":"2016 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications (SPAWDA)","volume":"111 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128234775","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: 7
Ultrasound effect on vascular smooth muscle cells in vitro: A preliminary parametric study 超声对体外血管平滑肌细胞影响的初步参数研究
2016 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications (SPAWDA) Pub Date : 2016-10-01 DOI: 10.1109/SPAWDA.2016.7829953
Ming-Jian Li, Yu-wen Li, Chang-ning Hao, M. Ye, Su Zhang, Xiang Ji
{"title":"Ultrasound effect on vascular smooth muscle cells in vitro: A preliminary parametric study","authors":"Ming-Jian Li, Yu-wen Li, Chang-ning Hao, M. Ye, Su Zhang, Xiang Ji","doi":"10.1109/SPAWDA.2016.7829953","DOIUrl":"https://doi.org/10.1109/SPAWDA.2016.7829953","url":null,"abstract":"High incidence of intra-stent restenosis (ISR) remains a troublesome issue after endovascular treatment for arteriosclerosis obliterans. ISR is mainly caused by neointimal hyperplasia, which refers to proliferation and migration of vascular smooth muscle cells (VSMCs). Previous studies showed that sonotherapy might reduce neointimal hyperplasia through inhibiting VSMC proliferation and migration in vivo. However, there is still no consensus on the sonication parameters. This study is aimed to evaluate the effect of sonication parameters on VSMCs in vitro, including frequency, acoustic intensity and duration. Sonications were exposed to cultured human VSMCs. Frequency varied from 0.497MHz to 2.718MHz while duration varied from 1min to 20mins, and the maximum of acoustic intensity was 0.675W/cm2. The post-sonication cell number was measured through cell counting kit-8, and the cell apoptosis was evaluated using trypan blue staining. Moreover, the thermal effect on VSMC proliferation was assessed. After the comparison of results from sonication parameter settings, the following parameters could be recommended for the inhibition of VSMCs proliferation: frequency is 0.7–0.8MHz, acoustic intensity is about 0.5W/cm2 and duration is 5–8 mins.","PeriodicalId":243839,"journal":{"name":"2016 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications (SPAWDA)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124440915","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
Analysis on ambient temperature effects on piezoelectric actuated tracked mobile system 环境温度对压电驱动履带式移动系统的影响分析
2016 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications (SPAWDA) Pub Date : 2016-10-01 DOI: 10.1109/SPAWDA.2016.7829974
Di Chen, Liang Wang, Jian Liu, Jiamei Jin
{"title":"Analysis on ambient temperature effects on piezoelectric actuated tracked mobile system","authors":"Di Chen, Liang Wang, Jian Liu, Jiamei Jin","doi":"10.1109/SPAWDA.2016.7829974","DOIUrl":"https://doi.org/10.1109/SPAWDA.2016.7829974","url":null,"abstract":"In order to study the thermal adaptability of piezoelectric actuated tracked mobile system, a theoretical model is developed for investigating the effect of ambient temperature on the characteristics of piezoelectric actuated tracked mobile system based on finite element method and Coulomb's friction law. In the analysis, the temperature-dependent mechanical properties of materials, thermal stress and their combination are considered to investigate the effect of ambient temperature on the vibration amplitude and resonant frequency of the piezoelectric transducer by the finite element method; Then on this basis a contact model is built to calculate the relationship of traction force versus speed, in which the effect of ambient temperature on contact interface was included. And then, a temperature experimental system is established to measure the characteristics of piezoelectric actuated tracked mobile system to demonstrate the theoretical model. The experimental results basically agree with the theoretical model. At last, the proportion of effects of material's temperature coefficients on changes of characteristics of piezoelectric actuated tracked mobile system is obtained. The results obtained by the theoretical model give useful guidelines for the optimization of piezoelectric actuated tracked mobile system operating in extreme temperature environment.","PeriodicalId":243839,"journal":{"name":"2016 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications (SPAWDA)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134589512","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
Nonlinear effect in fat tissue for high-intensity focused ultrasound 高强度聚焦超声在脂肪组织中的非线性效应
2016 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications (SPAWDA) Pub Date : 2016-10-01 DOI: 10.1109/SPAWDA.2016.7829971
Shou-bei Wang, Ke Li, Bo-fan Zhou, Xiang Ji
{"title":"Nonlinear effect in fat tissue for high-intensity focused ultrasound","authors":"Shou-bei Wang, Ke Li, Bo-fan Zhou, Xiang Ji","doi":"10.1109/SPAWDA.2016.7829971","DOIUrl":"https://doi.org/10.1109/SPAWDA.2016.7829971","url":null,"abstract":"Nonlinearity plays a significant role in high-intensity focused ultrasound (HIFU) treatment since the generation of higher harmonic frequency components enhances absorption and thus heating effects. High-B/A fat layer commonly appears in the propagation path so that HIFU fields could be affected by nonlinearity and attention needs to be paid to the changes since caused for nonlinearity may not be easily perceived by usual linear viewpoint. To gain a more accurate knowledge in the interaction of ultrasound through multi-layered tissue and better control therapeutic outcome, a HIFU simulator software package is used to numerically simulate the axisymmetric ultrasound propagation through water-fat layered medium. Results show that nonlinearity plays a major part in increasing peak acoustic intensity (/peak) and decreasing focus deviation (Δzfocus) for HIFU propagation in fat. Furthermore, sharper focused transducer with higher acoustic power could enhance nonlinear effect.","PeriodicalId":243839,"journal":{"name":"2016 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications (SPAWDA)","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124111085","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
Fundamental solutions and analysis of rectangular crack in 3D thermopiezoelectric media 三维热压电介质中矩形裂纹的基本解与分析
2016 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications (SPAWDA) Pub Date : 2016-10-01 DOI: 10.1109/SPAWDA.2016.7830030
Yuan Li, C. Fan, GuangTao Xu, M. Zhao
{"title":"Fundamental solutions and analysis of rectangular crack in 3D thermopiezoelectric media","authors":"Yuan Li, C. Fan, GuangTao Xu, M. Zhao","doi":"10.1109/SPAWDA.2016.7830030","DOIUrl":"https://doi.org/10.1109/SPAWDA.2016.7830030","url":null,"abstract":"Due to their pronounced piezoelectric, dielectric and pyroelectric properties, thermo piezoelectric materials have being widely used in sensors, actuators, transducers and intelligent structures, etc. Considering thermal effects, this paper derives the fundamental solutions for uniformly distributed extended displacement discontinuities on rectangular elements in the isotropic plane of a 3D thermo piezoelectric medium and investigates a rectangular crack subjected to thermal loadings.","PeriodicalId":243839,"journal":{"name":"2016 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications (SPAWDA)","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116122726","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
A numerical approach to calculate multivariate transcendental equations in complex domain 复域多元超越方程的数值计算方法
2016 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications (SPAWDA) Pub Date : 2016-10-01 DOI: 10.1109/SPAWDA.2016.7829954
F. Zhu, Z. Qian, Bin Wang
{"title":"A numerical approach to calculate multivariate transcendental equations in complex domain","authors":"F. Zhu, Z. Qian, Bin Wang","doi":"10.1109/SPAWDA.2016.7829954","DOIUrl":"https://doi.org/10.1109/SPAWDA.2016.7829954","url":null,"abstract":"A numerical approach to calculate multivariate transcendental equations in complex number domain that can be applied to solve dispersion equation is presented here. The mathematical derivations of the convergence of the moduli of the equations around null point are presented strictly, when the transcendental equation is univariate. Similar process also applies to the case when the equations are multivariate. For multivariate equations, the forms of scanning elements are chosen according to the numbers of the variables and the dimensions of the solution. To validate the proposed approach, we calculate the dispersion cures of wave propagation in an infinite piezoelectric plate. As a result, the three-dimensional dispersion curves of complex wave numbers and real frequencies are obtained correctly.","PeriodicalId":243839,"journal":{"name":"2016 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications (SPAWDA)","volume":"84 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117168333","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
Solution of an orthotropic elliptic plate with an elliptic hole or crack 带椭圆孔或裂纹的正交各向异性椭圆板的解
2016 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications (SPAWDA) Pub Date : 2016-10-01 DOI: 10.1109/SPAWDA.2016.7829960
Hai-Bing Yang, M. Dai, C. Gao
{"title":"Solution of an orthotropic elliptic plate with an elliptic hole or crack","authors":"Hai-Bing Yang, M. Dai, C. Gao","doi":"10.1109/SPAWDA.2016.7829960","DOIUrl":"https://doi.org/10.1109/SPAWDA.2016.7829960","url":null,"abstract":"Based on the complex variable method, the problem of an elliptic plate with an elliptic hole or a crack is addressed under uniform tension or pressure imposed on the boundary of the hole and on the edge of the plate. A series solution for the stress field inside the plate is derived using conformal mapping techniques, Faber series and Fourier expansion method. The stress fields around the hole or crack relative to the distance between the hole or crack and the edge of the plate are discussed in several examples. It is found that the hoop stress around the hole and the stress intensity factors at the crack tips increase steeply with deceasing distance between the hole or crack and the edge of the plate.","PeriodicalId":243839,"journal":{"name":"2016 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications (SPAWDA)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115341627","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
An analysis of thickness-shear vibrations of circular quartz crystal plates 圆形石英晶体板的厚度-剪切振动分析
2016 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications (SPAWDA) Pub Date : 2016-10-01 DOI: 10.1109/SPAWDA.2016.7829966
C. Hao, R. Wu, Bin Huang, A. Zhang, T. Ma, Jianke Du, Dan Wu, Ji Wang
{"title":"An analysis of thickness-shear vibrations of circular quartz crystal plates","authors":"C. Hao, R. Wu, Bin Huang, A. Zhang, T. Ma, Jianke Du, Dan Wu, Ji Wang","doi":"10.1109/SPAWDA.2016.7829966","DOIUrl":"https://doi.org/10.1109/SPAWDA.2016.7829966","url":null,"abstract":"Quartz crystal resonators of circular type are widely used for frequency control and detection functions with the quartz crystal plate vibrating at the thickness-shear mode. Naturally, vibrations of circular quartz crystal plates are of great interests in the design and optimization of resonators. We have derived the Mindlin plate equations for the thickness-shear vibrations of circular plates in a systematic manner. We have further proved that the thickness-shear vibrations of circular plates are consistent with rectangular plates in dispersion relations. By truncating the infinite two-dimensional equations for the thickness-shear vibrations, we obtained a set of equations with only selected vibration modes. Solving the coupled equations for thickness-shear vibration frequencies and mode shapes, we can use these results for the optimal selection of plate parameters to improve performance of resonators. The analytical equations and solution procedure are important in the analysis of quartz crystal vibrations.","PeriodicalId":243839,"journal":{"name":"2016 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications (SPAWDA)","volume":"73 6","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121015132","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
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