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2014年全国压电和声波理论及器件应用研讨会

作者： Fa-peng YU Qing-ming LU Shu-jun ZHANG Xu-tang TAO Xian ZHAO State Key Laboratory of Crystal Materials and Institute of Crystal Materials Shandong University School of Chemistry and Chemical Engineering Shandong University Materials Research Institute Pennsylvania State UniversityUniversity Park

Background and Motivation After the discovery of piezoelectric effect in 1880,various piezoelectric devices have been designed and fabricated,such as resonators,filters,transducers,actuators and sensors *** the developments of techniques,high temperature sensors are desired in many tech *** materials that are operational at elevated temperatures without failure are

关键词： BIBO Piezoelectric crystal Optimum crystal cuts

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USING ACOUSTIC LOGGING SIGNALS OF SEGMENTED BOND TOOL TO DETECT THE CEMENTING QUALITY

USING ACOUSTIC LOGGING SIGNALS OF SEGMENTED BOND TOOL TO DET...

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2014年全国压电和声波理论及器件应用研讨会

作者： Pei-xiao LI Xiu-mei ZHANG Wei-jun LIN State Key Laboratory of Acoustics Institute of AcousticsChinese Academy of Sciences

＜正＞Background,Motivation and Objective In oil well operations,cement sheath is located between the casing and formation to provide zonal isolation through the life of a *** of cement sheath integrity is vital for a... 详细信息

关键词： 3D finite difference Acoustic logging Second interface Full wave logging

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ANALYSIS OF DEFECT STATES OF TWO-DIMENSIONAL PHONONIC CRYSTALS BASED ON BOUNDARY ELEMENT METHOD

ANALYSIS OF DEFECT STATES OF TWO-DIMENSIONAL PHONONIC CRYSTA...

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2014年全国压电和声波理论及器件应用研讨会

作者： Feng-lian LI Yue-sheng WANG Chuanzeng ZHANG Gui-lan YU School of mechanical and engineering Beijing Information and Technology University Institute of Engineering Mechanics Beijing Jiaotong University Department of Civil Engineering University of Siegen School of Civil Engineering Beijing Jiaotong University

In analogy to photonic crystals, phononic crystals may exhibit complete band gaps in their transmission spectra where the propagation of acoustic or elastic waves is strictly forbidden in all directions. The complete band gaps could be engineered to provide a vibrationless environment for high precision mechanical systems in given frequency ranges. Understanding the full band structures is expected to lead to the design of new generations of sound shields, filters, transducers, refractive devices such as acoustic lenses and acoustic interferometers, etc. By breaking the periodicity of the systems, it is possible to create highly localized defect or guided modes within the acoustic band gaps, which are analogous to localized modes in a photonic crystal and to localized impurity states in a semiconductor. This makes the phononic crystals potential candidates for the design of elastic or acoustic wave guides. In the case of solid/solid systems, the existence of full band gaps and localized defect modes and the possibility of guiding waves have been investigated theoretically using the different methods. In the present paper, this boundary element method is extended to the calculation of the defect states in two-dimensional phononic crystals. We consider a 2D phononic crystal consisting of a square array. Both scatterers and matrix are homogeneous, isotropic and linear elastic solids. Due to the periodicity of the system, we can restrict our attention to a supercell. For the solid/solid system, when the binary components perfectly contact, the boundary conditions along the interface are that the displacements and the stresses are *** addition, the periodicity of the structures implies that any field quantity(e.g. the displacement, stress, pressure and their derivatives) should obey the following Bloch theorem. The Bloch theorem allows us to solve the problem in a supercell. We bulid the boundary integral equations of the matrix and every scatter. Then the boun

关键词： Boundary element method,Defect states,Phononic crystals

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浙江东晶电子股份有限公司

浙江东晶电子股份有限公司

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2013全国压电和声波理论及器件技术研讨会

股票简称:东晶电子股票代码:002199浙江东晶电子股份有限公司简介浙江东晶电子股份有限公司是国家重点高新技术企业,中国电子元件百强,2007年在深交所上市,下辖全资(控股)公司5家。东晶电子专业从事高精度、高稳定、高品质石英晶体元器... 详细信息

股票简称:东晶电子股票代码:002199浙江东晶电子股份有限公司简介浙江东晶电子股份有限公司是国家重点高新技术企业,中国电子元件百强,2007年在深交所上市,下辖全资(控股)公司5家。东晶电子专业从事高精度、高稳定、高品质石英晶体元器件系列产品的研发、设计与生产,拥有国际最先进的全自动生产线40条,具有年产各类石英晶体元器件10亿只的能力。公司通过自主创新,加快技术更新,不断推进产品向微型化、功能化、高精度方向发展,以满足智能手机、便携电脑、智慧电视和汽车电子等高端市场的需求。2013年与行业巨头新西兰锐康合作,实现

关键词：股份有限公司石英晶体元器件全自动生产线

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ACOUSTIC PROPERTY OF SLIGHTLY COMPRESSIBLE POROUS MEDIA AND UNDERWATER STRUCTURE-BORNE NOISE REDUCTION

ACOUSTIC PROPERTY OF SLIGHTLY COMPRESSIBLE POROUS MEDIA AND ...

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2012全国压电和声波理论及器件技术研讨会

作者： Bo QIN College of Aerospace Engineering Nanjing University of Aeronautics and Astronautics

ISBN: (纸本)9781467348140

The weakly compressible viscoelastic medium permeated with micro-bubbles has strong dispersive because of *** effective sound speed which can be obtained by effective medium method is very small at low frequency *** on the acoustic wave equations and boundary conditions,a method is applied to analyze the reduction of underwater structure-borne noise generated by an axially symmetric ring force on the interior of cylindrical *** structure-borne noise reduction is simulated for the baffle layer of slightly compressible porous *** effects of porosity,thickness,damping and shear modulus of matrix are *** simulations have confirmed that the underwater structure-borne noise can be reduced effectively by the porous *** work is helpful for designing the underwater noise control material.

关键词： Slightly compressible porous media Structure-borne noise Noise reduction

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“2009年全国压电和声波理论及器件技术研讨会暨2009年全国频率控制技术年会”纪要

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力学进展 2010年第2期40卷 236-236页

作者：胡元太华中科技大学

2009年12月17日至20日,由中国力学学会、中国声学学会、中国宇航学会计量与测试专业委员会、中国电子元器件行业协会压电晶体分会和IEEE等主办。

关键词：电子元器件技术研讨会压电晶体控制技术年会频率声波中国航天科工集团

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NUMERICAL ANALYSES ON THE SANDWICH DIPOLE LOGGING TRANSDUCER WITH VARIOUS LOADS

NUMERICAL ANALYSES ON THE SANDWICH DIPOLE LOGGING TRANSDUCER...

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2012全国压电和声波理论及器件技术研讨会

作者： Qiu-ying CHEN Jian-sheng CONG Xiao-min WANG Xiu-ming WANG State Key Laboratory of Acoustics Institute of AcousticsChinese Academy of Sciences

ISBN: (纸本)9781467348140

Numerical modeling for a sandwich dipole well logging transmitting transducer is conducted in this *** characteristics for the first-order bending vibration of the sandwich transducer within different fluid loads are numerically *** is found that the resonant frequency and transmitting voltage response level are affected by the density,acoustic velocity and acoustic impedance of the fluid *** numerical results were preliminarily vahdated by our *** numerical analyses may provide useful suggestion for both the simulation design of logging transducer and the acoustic logging applications.

关键词： Bending vibration mode Load Resonant frequency Transmitting voltage response

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A NOVEL ROTARY PIEZOELECTRIC MOTOR FOR AEROSPACE APPLICATION

A NOVEL ROTARY PIEZOELECTRIC MOTOR FOR AEROSPACE APPLICATION

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2012全国压电和声波理论及器件技术研讨会

作者： Xiao-long LU Jun-hui HU Chun-sheng ZHAO State Key Lab of Mechanics and Control of Mechanical structures Nanjing University of Aeronautics and Astronautics

ISBN: (纸本)9781467348140

A novel in-plane mode rotary ultrasonic motor is designed in this *** Langevin type bending vibrators are placed separately around the ring shaped stator and used to excite an in-plane vibration mode of the ring *** tapered rotors are assembled to the inner ring of the stator and clamped together by screw nut.A thin cylindrical supporting is placed under the stator ring,which makes the motor more stable and convenient to *** ultrasonic motor has no bearings,which is good at operating in cryogenic and vacuum environment.

关键词： Ultrasonic motor In-plane vibration mode Langevin transducers No bearing

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DIPOLE SOURCE MISMATCH AND ITS EFFECTS ON SONIC LOGGING

DIPOLE SOURCE MISMATCH AND ITS EFFECTS ON SONIC LOGGING

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2012全国压电和声波理论及器件技术研讨会

作者： Hao CHEN Xiu-ming WANG Xiao HE Xue-bing YANG State key Laboratory of Acoustics Institute of AcousticsChinese Academy of Sciences Interpretation Centre of Daqing Well Logging Company

ISBN: (纸本)9781467348140

Wavefields excited by a dipole source with ampUtude mismatch are investigated through a 3D finite difference *** is revealed that the directional patterns of a dipole source mainly depend on the source frequency and the ampUtude ratio of the two monopoles combining the transmitter.A mismatched dipole will not generate the non-dipole components in the borehole as long as the dipole receivers are ideally *** both the transmitter and receivers are mismatched,the Stoneley mode with strong amplitudes appears in the in-line and cross-line components of the cross-dipole sonic logging *** would probably lead to incorrect evaluations of shear velocity and azimuthal anisotropy of the formation.

关键词： Dipole Mismatch Logging Acoustics

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浙江东晶电子股份有限公司

浙江东晶电子股份有限公司

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2012全国压电和声波理论及器件技术研讨会

股票简称:东晶电子股票代码:002199浙江东晶电子股份有限公司是国家重点高新技术企业、中国电子元件百强,2007年12月在深交所上市。东晶电子专业从事高精度、高稳定、高品质石英晶体元器件系列产品的研发、设计与生产,为全球通信、资讯... 详细信息

股票简称:东晶电子股票代码:002199浙江东晶电子股份有限公司是国家重点高新技术企业、中国电子元件百强,2007年12月在深交所上市。东晶电子专业从事高精度、高稳定、高品质石英晶体元器件系列产品的研发、设计与生产,为全球通信、资讯、网络、汽车电子和家用电器提供优质电子元器件的专业制造商,拥有国际最先进的全自动生产线40条,具有年产各类石英晶体元器件10亿只的能力,技术水平、设备的先进程度、生产规模均居国内同

关键词：股份有限公司石英晶体元器件全自动生产线股票代码

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