|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | COUPLED ANALYSIS FOR THE HARVESTING STRUCTURE AND THE MODULATING CIRCUIT IN A PIEZOELECTRIC BIMORPH ENERGY HARVESTER显示文摘The authors analyze a piezoelectric energy harvester as an electro-mechanically coupled system.The energy harvester consists of a piezoelectric bimorph with a concentrated mass attached at one end,called the harvesting structure,an electric circuit for energy storage, and a rectifier that converts the AC output of the harvesting structure into a DC input for the storage circuit.The piezoelectric bimorph is assumed to be driven into flexural vibration by an ambient acoustic source to convert the mechanical energies into electric energies.The analysis indicates that the performance of this harvester,measured by the power density,is characterized by three important non-dimensional parameters,i.e.,the non-dimensional inductance of the storage circuit,the non-dimensional aspect ratio (length/thickness) and the non-dimensional end mass of the harvesting structure.The numerical results show that:(1) the power density can be optimized by varying the non-dimensional inductance for each fixed non-dimensional aspect ratio with a fixed non-dimensional end mass;and (2) for a fixed non-dimensional inductance,the power density is maximized if the non-dimensional aspect ratio and the non-dimensional end mass are so chosen that the harvesting structure,consisting of both the piezoelectric bimorph and the end mass attached,resonates at the frequency of the ambient acoustic source. | Yuantai Hu Ting Hu Qing Jiang | 2007 | Acta Mechanica Solida Sinica2007，20，4： | 7 |
| 2 | An improved piezoelectric harvester available in scavenging-energy from the operating environment with either weaker or stronger vibration levels显示文摘An improved harvester available in scavenging energy from the operating environment with either weaker or stronger vibration levels is studied. To ensure the optimal harvester performance, a Cuk dc-dc converter is employed into the modulating circuit. This paper reports how this harvester scav- enges maximal energy from varying-level vibrations and store energy into an electrochemical battery. Dependence of the duty cycle upon the external vibration level is calculated, and it is found that: 1) for weaker vibrations, the charging current into the battery is smaller than the allowable current, and thus all the optimal output power of the harvesting structure can be absorbed by the battery. In this case, the duty cycle should be fixed at 1.86%; 2) for stronger external forcing, the allowable charging current of the battery is smaller than the optimal harvested current. This indicates that just a portion of the sca- venged energy can be accepted by the battery. Thus, the duty cycle should be decreased gradually with the increase of the vibration level. Finally the energy transmission process and the roles of each elec- tronic element are analyzed. It is shown that a Cuk converter can greatly raise the efficiency of such a harvester, particularly when subjected to a weaker ambient vibration. | XUE Huan HU HongPing HU YuanTai CHEN XueDong | 2009 | Science China(Physics,Mechanics & Astronomy)2009，52，2： | 5 |
| 3 | ANALYSIS ON BUCKLING AND POSTBUCKLING OF DELAMINATION IN 3D COMPOSITES显示文摘In this paper, the problem of axisymmetric buckling and postbuckling of a circular thin-film delamination bridged by through-thickness fiber tows in 3D composites is presented. An iterativeprocedure based on Taylor’s series expansion is used to generate a family of nondimensionalized post-buckling solutions of the above problem by yon Karman’s nonlinear plate theory. Attention is fo-cused, herein, on the effects of the bridge force of through-thickness fibers on the buckling and post-buckling behavior of the delamination. It is found that fiber bridge not only increases the ability of re-sisting delamination buckling and postbuckling, but also brings on the jump of the delamination deflec-tion mode during the postbuckling phase. Consequently the behavior of the composite structure with de-lamination is greatly improved, such as increasing the residual strength and prolonging the service life. | Li Siping** Huang Yuying Hu Yuantai Zhong Weifang, Huazhong University of Science and Technology, Wuhan 430074, China Doctoral candidate from Zhengzhou University of Technology, Zhengzhou 450002, China. | 1997 | Acta Mechanica Solida Sinica1997，10，3： | 4 |
| 4 | AN ANALYSIS OF A CYLINDRICAL THIN SHELL AS A PIEZOELECTRIC TRANSFORMER显示文摘有正切的 poling 的圆形的圆柱的压电的陶器的壳的颤动被调查因为变压器申请和一个分析答案被获得。输出电压,输入进入和变压器的效率的数字计算被介绍。结果显示分析的结构能与驾驶频率和匹配的负担阻抗的某个泛音被用作一个压电的变压器。 | Gao Farong Hu Hongping Hu Yuantai Xiong Caihua | 2007 | Acta Mechanica Solida Sinica2007，20，2： | 4 |
| 5 | BASIC CURVILINEAR COORDINATE EQUATIONS OF ELECTROELASTIC PLATES UNDER BIASING FIELDS WITH APPLICATIONS IN BUCKLING ANALYSIS显示文摘The authors have developed a two-dimensional model for the extension and flexure response ofelectroelastic plates under biasing fields in a curvilinear coordinate system.Applications of the model in ana-lyzing buckling of two circular piezoelectric plates,one single-layered and the other double-layered,are in-cluded.The analysis indicates that the piezoelectric couphng has a strengthening effect against buckling. | Hu Yuantai Chen Chuanyao Li Guoqing Yang Jiashi Jiang Qing | 2002 | Acta Mechanica Solida Sinica2002，15，3： | 3 |
| 6 | Stress-induced potential barriers and charge distributions in a piezoelectric semiconductor nanofiber显示文摘The performance of a piecewise-stressed ZnO piezoelectric semiconductor nano?ber is studied with the multi-?eld coupling theory. The ?elds produced by equal and opposite forces as well as sinusoidally distributed forces are examined. Speci?c distributions of potential barriers, wells, and regions with effective polarization charges are found. The results are fundamental for the mechanical tuning on piezoelectric semiconductor devices and piezotronics. | Shuaiqi FAN Yuantai HU Jiashi YANG | 2019 | Applied Mathematics and Mechanics(English Edition)2019，40，5： | 3 |
| 7 | AN EXACT ANALYSIS OF FORCED THICKNESS-TWIST VIBRATIONS OF MULTI-LAYERED PIEZOELECTRIC PLATES显示文摘这篇论文处理 multi-layered 的厚度扭曲颤动 6 公里对称或极化的陶艺的晶体的矩形的压电的板。一个准确答案从线性压电的三维的方程被获得。答案对合成压电的设备的理解和设计有用。一个压电的共鸣器,一个压电的变压器,和一个压电的发电机作为例子被分析。 | Hu Hongping Chen Ziguang Yang Jiashi Hu Yuantai | 2007 | Acta Mechanica Solida Sinica2007，20，3： | 3 |
| 8 | Coupled vibrations and frequency shift of compound system consisting of quartz crystal resonator in thickness-shear motions and micro-beam array immersed in liquid显示文摘The dynamic characteristics of a quartz crystal resonator(QCR) in thicknessshear modes(TSM) with the upper surface covered by an array of micro-beams immersed in liquid are studied. The liquid is assumed to be inviscid and incompressible for simplicity. Dynamic equations of the coupled system are established. The added mass effect of liquid on micro-beams is discussed in detail. Characteristics of frequency shift are clarified for different liquid depths. Modal analysis shows that a drag effect of liquid has resulted in the change of phase of interaction(surface shear force), thus changing the system resonant frequency. The obtained results are useful in resonator design and applications. | Xuan XIE Lingcheng KONG Yuxi WANG Jun ZHANG Yuantai HU | 2015 | Applied Mathematics and Mechanics(English Edition)2015，36，2： | 3 |
| 9 | Enhancement the Adhesion between Epoxy Coating and Rusted Structural Steel by Tannic Acid Treatment显示文摘An eco-friendly rust converter treatment based on tannic acid was optimized by orthogonal experiment, and the adhesion of the epoxy top-coating system was evaluated. The results showed that the adhesion between the epoxy coating and the rusted steel after treatment was enhanced from 1.93 to 5.97 MPa. This adhesion improvement was attributed to the formation of the micro-cracked tannic conversion layer and the increase of the compactness of the rust layer. The failure analysis suggested that the remainder rust was still the key issue for the further adhesion improvement of the coating system. | Yang Li Yuantai Ma Bin Zhang Bing Lei Ying Li | 2014 | Acta Metallurgica Sinica(English Letters)2014，27，6： | 2 |
| 10 | BOUNDARY VALUE PROBLEMS OF TWO-DIMENSIONAL ANISOTROPIC BODY WITH A PARABOLIC BOUNDARY显示文摘Based upon Stroh formalism we derive a novel and convenient scheme for determiningthe elastic fields of a two-dimensional anisotropic body with a parabolic boundary subject to two kindsof boundary conditions, which are free surface and rigid surface, respectively. The correspondingGreen’s functions are found by using the conformal mapping method. When the parabolic curve de-generates into a half-infinite crack or rigid inclusion, the singular stress fields near the tip of defectsare obtained. In particular, those Green’s functions for a concentrated moment M0 applied at a pointon the parabolic curve are also studied. It is easily found that arbitrary parabolic boundary value prob-lems can be solved by using these Green’s functions and associate integrals. | Hu Yuantai Huang Yuying Zhong Weifang, Department of Mechanics, Huazhong University of Science and Technology, Wuhan 430074 | 1996 | Acta Mechanica Solida Sinica1996，9，2： | 2 |
| 11 | Corrosion of low carbon steel in atmospheric environments of different chloride content显示文摘 | Yuantai Ma Ying Li Fuhui Wang | 2009 | Corrosion Science2009，，5： | 2 |
| 12 | Formation process of akaganeite in the simulated wet-dry cycles atmospheric environment显示文摘In order to clarify the formation mechanism and conditions for akaganeite in long-term exposure,the influence of the former corrosion results on akaganeite formation was investigated by simulated experiments in laboratory.The combination of XRD,FTIR,SEM and EPMA enabled the identification of the rust layer formed on the surface.Accordingly,the nature of the rust layer and the amount of the corrosive species in the rust layer varied with the extension of the exposure.Among them,comparing with the corrosion condition in initial stage,the structure of rust layer after repeated wet-dry cycles was disadvantage for akaganeite formation.Element Cl aggregated at the interface between rust and substrate in the thick part can participate in the formation of akaganeite after the rust layer covered removed.The accumulation effect of salt deposited contributed to akaganeite formation under the condition that salt deposition rate was relatively low. | Haigang Xiao Wei Ye Xiaoping Song Yuantai Ma Ying Li | 2018 | Journal of Materials Science & Technology2018，34，8： | 2 |
| 13 | On modeling of extension and flexure response of electroelastic shells under biasing fields显示文摘 | Hu Yuantai Yang Jiashi Jiang Qing | 2002 | Acta Mech2002，156，314： | 1 |
| 14 | Nonlinear inter face between the piezoelectric harvesting structure and the modulating circuit of an energy harvester with a real storage battery显示文摘 | Yuantai H Huan X Ting H | 2008 | IEEE Transactions on Ultrasonics Ferroelectrics and Frequency Control2008，55，1： | 1 |
| 15 | Influence of surface micro-beams with large deflection on the resonance frequency of a quartz crystal resonator in thickness-shear mode vibrations显示文摘We study the dynamic behavior of a quartz crystal resonator(QCR)in thickness-shear vibrations with the upper surface covered by an array of micro-beams(MBs)under large deflection.Through taking into account the continuous conditions of shear force and bending moment at the interface of MBs/resonator,dependences of frequency shift of the compound QCR system versus material parameter and geometrical parameter are illustrated in detail for nonlinear and linear vibrations.It is found that the frequency shift produces a little right(left)translation for increasing elastic modulus(length/radius ratio)of MBs.Moreover,the frequency right(left)translation distance caused by nonlinear deformation becomes more serious in the second-order mode than in the first-order one. | Chi Luo Jiemin Xie Yuantai Hu | 2017 | Theoretical & Applied Mechanics Letters2017，7，2： | 1 |
| 16 | Nonlinear in-terface betw een the piezoelectric harvesting structure andthe modulating circuit of an energy harvester w ith a realstorage battery显示文摘 | HU Yuantai XUE Huan HU Ting | 2008 | IEEE Transactions on Ultrasonics Ferroelectrics and Frequency Control2008，55，1： | 1 |
| 17 | Nonlinear inter face between the piezoelectric harvesting structure and modulating circuit of an energy harvester with a real storage battery显示文摘 | Hu Yuantai Xue H Hu T | 2008 | IEEE Transactions on Ultrasonics Ferroelectrics and Frequency Control2008，55，1： | 1 |
| 18 | Corrosion of low carbon steel in atmospheric environments of different chloride content显示文摘 | Yuantai Ma Ying Li Fuhui Wang | 2009 | Corrosion Science2009，，5： | 1 |
| 19 | The effect of β-FeOOH on the corrosion behavior of low carbon steel exposed in tropic marine environment显示文摘 | Yuantai Ma Ying Li Fuhui Wang | 2008 | Materials Chemistry and Physics2008，，3： | 1 |
| 20 | HIGH-FREQUENCY VIBRATIONS OF CORRUGATED CYLINDRICAL PIEZOELECTRIC SHELLS显示文摘顺利由圆形的圆柱的表面的多重片组成的弄皱的圆柱的压电的壳的圆柱的颤动沿着他们的母点连接了的联合 extensional 和 exural 被学习。与短波长为相对厚的壳或相等地高周波的模式的盒子验证结果,存在分析被考虑扩大砍变丑和旋转惯性。一个分析答案被获得。基于答案,反响的频率和模式形状被计算。 | Hualong Du Limei Xu Hongping Hu Yuantai Hu Xuedong Chen Hui Fan Jiashi Yang | 2008 | Acta Mechanica Solida Sinica2008，21，6： | 1 |
您所在的机构暂未开通此部分的功能，请联系管理员