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学者姓名：曹东兴
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摘要 ：
本发明公开了一种基于振动能量采集技术的混合式自供电动物追踪器，属于再生环保新能源领域。是由外壳、项带、固定轴、采集电路模块、GPS定位通信模块和混合俘能器组成的。本发明在有限的小空间采用混合式俘能结构来将收集到的环境中振动的机械能转换为电能，并且将收集到的电能通过采集电路模块和GPS定位通信模块处理后，即可通过开发的应用软件在设备上来查看动物的精确位置，能够克服目前所应用化学电池和利用太阳能发电的动物追踪器存在的一些显著缺点，实现长时间无源自供电，本发明以项圈的形式固定在动物的脖子上，能够避免宠物丢失的情况出现，同时也能够更方便有效的实现对牧区动物的定位、野生动物的跟踪监测。
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| GB/T 7714 | 曹东兴 , 孙雪松 , 马丽骞 et al. 一种基于振动能量采集技术的混合式自供电动物追踪器 : CN202310163380.X[P]. | 2023-02-24 . |
| MLA | 曹东兴 et al. "一种基于振动能量采集技术的混合式自供电动物追踪器" : CN202310163380.X. | 2023-02-24 . |
| APA | 曹东兴 , 孙雪松 , 马丽骞 , 贾艳超 , 詹昌海 . 一种基于振动能量采集技术的混合式自供电动物追踪器 : CN202310163380.X. | 2023-02-24 . |
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摘要 ：
An adaptive dynamic vibration absorber (ADVA) is designed for low-frequency vibration suppression. The leaf springs are applied as the tuning stiffness elements. The principle of variable stiffness is analyzed to obtain the effective range of the first natural frequency variation. A classic simply supported manipulator is selected as the controlled system. The coupled dynamic model of the manipulator-ADVA system is built to obtain the maximum damping efficiency and the vibration absorption capacity of the designed ADVA. An experimental platform is set up to verify the theoretical results. It is revealed that the ADVA can adjust the first natural frequency on a large scale by changing the curvature of the leaf springs. The amplitude of the manipulator is reduced obviously with the installation of the designed ADVA. Finally, based on the short-time Fourier transformation (STFT), a stepwise optimization algorithm is proposed to achieve a quick tuning of the natural frequency of the ADVA so that it can always coincide with the frequency of the prime structure. Through the above steps, the intelligent frequency tuning of the ADVA is realized with high vibration absorption performance in a wide frequency range.
关键词 ：
leaf spring leaf spring vibration control vibration control stiffness tuning stiffness tuning O342 O342 adaptive dynamic vibration absorber (ADVA) adaptive dynamic vibration absorber (ADVA)
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| GB/T 7714 | Guo, Xiangying , Zhu, Yunan , Qu, Yegao et al. Design and experiment of an adaptive dynamic vibration absorber with smart leaf springs [J]. | APPLIED MATHEMATICS AND MECHANICS-ENGLISH EDITION , 2022 , 43 (10) : 1485-1502 . |
| MLA | Guo, Xiangying et al. "Design and experiment of an adaptive dynamic vibration absorber with smart leaf springs" . | APPLIED MATHEMATICS AND MECHANICS-ENGLISH EDITION 43 . 10 (2022) : 1485-1502 . |
| APA | Guo, Xiangying , Zhu, Yunan , Qu, Yegao , Cao, Dongxing . Design and experiment of an adaptive dynamic vibration absorber with smart leaf springs . | APPLIED MATHEMATICS AND MECHANICS-ENGLISH EDITION , 2022 , 43 (10) , 1485-1502 . |
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摘要 ：
本发明涉及一种三方向可调节集中式压电俘能器，用于解决现有悬臂梁式俘能器只能俘获单个方向振动能量，在复杂的多向振动环境中俘能效率低的问题，具体包括第一压电悬臂梁、第二压电悬臂梁、第三压电悬臂梁、夹具、接头、支架和底座，其中，压电悬臂梁包括：弹性基体、压电材料和质量块。第一压电悬臂梁安装在接头的右侧，悬臂梁的方向朝上，第二压电悬臂梁安装在接头的下方，悬臂梁的方向朝右，第三压电悬臂梁安装在接头的左侧，悬臂梁的方向朝前。该俘能器的三个压电悬臂梁分别沿三个不同方向振动，能够俘获任意方向的振动能量，当外界环境为单向振动形式时，能够改变初始安装方式，增加该方向振动的压电悬臂梁数目。使用本发明能够取得在复杂多向振动环境中更好的俘能效果，解决了传统的单一压电悬臂梁俘无法调节振动方向的问题。
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| GB/T 7714 | 曹东兴 , 卢海东 . 一种三方向可调节集中式压电俘能器 : CN202210417324.X[P]. | 2022-04-20 . |
| MLA | 曹东兴 et al. "一种三方向可调节集中式压电俘能器" : CN202210417324.X. | 2022-04-20 . |
| APA | 曹东兴 , 卢海东 . 一种三方向可调节集中式压电俘能器 : CN202210417324.X. | 2022-04-20 . |
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摘要 ：
本文设计了一种将压电材料内嵌入于硅凝胶软材料中的三维自组装机械结构进行振动能量采集研究,并通过有限元方法计算了该结构的俘能特性。将设计好的2D前驱体在预定位置粘结到预拉伸的软弹性体基板上,释放基体预应力使2D前驱体压缩屈曲为三维结构,其中三维结构形式可通过改变预应力的大小进行调谐,将其嵌入到硅凝胶软材料中维持三维形状。通过在不同方向,不同频率对该结构进行激励,其结果表明:3D几何结构具有宽范围、可调谐、多方向的振动模态,且嵌入于软材料中一方面可以维持3D几何构型以防塌陷,另一方面可以降低系统的固有频率以实现宽低频、多方向的振动能量采集。
关键词 ：
3D自组装结构多模态多方向俘能 3D自组装结构多模态多方向俘能
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| GB/T 7714 | 卢一铭 , 曹东兴 . 基于嵌入式3D自组装结构的压电俘能器特性研究 [C] //北京力学会第二十七届学术年会论文集 . 2021 . |
| MLA | 卢一铭 et al. "基于嵌入式3D自组装结构的压电俘能器特性研究" 北京力学会第二十七届学术年会论文集 . (2021) . |
| APA | 卢一铭 , 曹东兴 . 基于嵌入式3D自组装结构的压电俘能器特性研究 北京力学会第二十七届学术年会论文集 . (2021) . |
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摘要 ：
为了实现压力管道智能监测与检测的自供电技术,探讨管道压力脉动能量采集技术,本文提出了一种具有力学放大器的增强型压电叠堆俘能器.基于牛顿力学原理理论推导了力学放大器的放大系数,利用有限元方法对俘能器进行了谐响应分析并讨论了结构参数对输出电压的影响规律,通过实验研究了力学放大器与管道中的扰流体对俘能器俘能效率的影响.研究结果表明:通过调整力学放大器的结构能够有效提高俘能器的开路输出电压,在水流管道中添加扰流体有利于提高管道内压力脉动,进一步提高了俘能器的输出功率.本文的研究结果对压力管道能量收集器的设计和应用具有重要的借鉴意义.
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| GB/T 7714 | 曹东兴 , 段祥健 , 张伟 . 水流管道压力脉动能量采集器实验研究 [J]. | 哈尔滨工程大学学报 , 2021 , 42 (8) : 1154-1161 . |
| MLA | 曹东兴 et al. "水流管道压力脉动能量采集器实验研究" . | 哈尔滨工程大学学报 42 . 8 (2021) : 1154-1161 . |
| APA | 曹东兴 , 段祥健 , 张伟 . 水流管道压力脉动能量采集器实验研究 . | 哈尔滨工程大学学报 , 2021 , 42 (8) , 1154-1161 . |
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摘要 ：
设计了一种由圆柱形散射体嵌入环氧树脂基体而组成的周期阵列局域共振型声子晶体板结构,分析了其平直带区域以及缺陷态的能量集中特性,并研究了其振动能量采集特性.首先基于超元胞法结合有限元方法分析了5×5完美声子晶体结构和缺陷态声子晶体结构的能带曲线和能量传输特性;考虑点缺陷局域共振声子晶体结构的能量集中特性,利用压电材料代替超元胞中某点的散射体材料引入点缺陷,分析其振动能量采集特性,结果表明单个5×5点缺陷超胞结构共振频带较窄;为提升俘能效率,提出两种由3个具有不同缺陷态数量和构型的5×5超元胞结构并联而成的5×15声子晶体板结构,机电耦合特性分析结果表明:所提出的局域共振型声子晶体板结构克服了单个...
关键词 ：
声子晶体 声子晶体 宽频带 宽频带 带隙 带隙 振动能量采集 振动能量采集 缺陷态 缺陷态
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| GB/T 7714 | 卢一铭 , 曹东兴 , 申永军 et al. 局域共振型声子晶体板缺陷态带隙及其俘能特性研究 [J]. | 力学学报 , 2021 , 53 (04) : 1114-1123 . |
| MLA | 卢一铭 et al. "局域共振型声子晶体板缺陷态带隙及其俘能特性研究" . | 力学学报 53 . 04 (2021) : 1114-1123 . |
| APA | 卢一铭 , 曹东兴 , 申永军 , 陈许敏 . 局域共振型声子晶体板缺陷态带隙及其俘能特性研究 . | 力学学报 , 2021 , 53 (04) , 1114-1123 . |
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摘要 ：
A local resonant phononic crystal plate, which is composed by quadrangular epoxy resin matrix embedded with cylindrical scatterers, is proposed to study the vibration energy harvesting performance. The bandgaps and energy concentration characteristics for the defect state structure are analyzed in detail. Firstly, the bandgap curve and energy transmission characteristics are analyzed for perfect and point defect phononic plate with 5 × 5 array structure based on supercell theory and finite element method. Considering the energy concentration characteristics of the point defect local resonance phononic crystal structure, piezoelectric material is used to replace the scatterer material of defect point, and the vibration energy characteristics are then analyzed. The results show that it has narrow resonance frequency band for the 5 × 5 point defect supercell structure. In order to improve the energy capture efficiency, two kind of new phononic crystal plate composed of three 5 × 5 supercells with different defect numbers and layout are proposed as the vibration energy harvester. According to the results of the electromechanical coupling analysis, it shows that the proposed local resonant phononic crystal plate overcomes the disadvantages of the single point defect supercell structure, such as too few defect modes and too narrow resonance frequency band. The working frequency band of the energy harvester is widened and the output voltage is increased. Additionally, it can further broaden the energy harvesting bandwidth and achieve better efficiency by introducing different number and configuration of defect states. © 2021, Chinese Journal of Theoretical and Applied Mechanics Press. All right reserved.
关键词 ：
Crystal structure Crystal structure Defects Defects Electromechanical coupling Electromechanical coupling Energy gap Energy gap Energy harvesting Energy harvesting Epoxy resins Epoxy resins Natural frequencies Natural frequencies Phonons Phonons Plates (structural components) Plates (structural components) Vibration analysis Vibration analysis
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| GB/T 7714 | Lu, Yiming , Cao, Dongxing , Shen, Yongjun et al. Study on the bandgaps of defect states and application of energy harvesting of local resonant phononic crystal plate [J]. | Chinese Journal of Theoretical and Applied Mechanics , 2021 , 53 (4) : 1114-1123 . |
| MLA | Lu, Yiming et al. "Study on the bandgaps of defect states and application of energy harvesting of local resonant phononic crystal plate" . | Chinese Journal of Theoretical and Applied Mechanics 53 . 4 (2021) : 1114-1123 . |
| APA | Lu, Yiming , Cao, Dongxing , Shen, Yongjun , Chen, Xumin . Study on the bandgaps of defect states and application of energy harvesting of local resonant phononic crystal plate . | Chinese Journal of Theoretical and Applied Mechanics , 2021 , 53 (4) , 1114-1123 . |
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摘要 ：
Morphing wing aircraft have generated increasing interest in recent years owing to their ability to alter the shape and configuration of the wings to retain optimum flight performance under different flight conditions. However, while theoretical approaches have greatly advanced our understanding of the nonlinear vibrational characteristics of morphing wings during the morphing process, little effort has been made to verify the results of theoretical studies based on corresponding experimental results. The present work addresses this issue by first investigating the nonlinear dynamic behaviors of Z-shaped morphing wings during the morphing process in subsonic flow based on thin airfoil theory under ideal incompressible fluid conditions. First, the steady aerodynamic lift on the morphing wing is derived and the nonlinear partial differential equations governing the morphing wing motion are established. The influence of the folding angle on the nonlinear responses of the morphing wing is investigated via numerical simulations. Then, the aeroelastic characteristics of the morphing wing, including the flutter displacements of edge points on the outer plate of the wing, are investigated using the computational fluid dynamics module in ANSYS. Finally, the results of theoretical analysis are verified by experiments conducted with a corresponding Z-shaped morphing wing model. (C) 2021 Elsevier Masson SAS. All rights reserved.
关键词 ：
Experimental research Experimental research Flutter displacements Flutter displacements Nonlinear vibrations Nonlinear vibrations Z-shaped morphing wings Z-shaped morphing wings
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| GB/T 7714 | Guo, Xiangying , Wang, Songsong , Qu, Yegao et al. Nonlinear dynamics of Z-shaped morphing wings in subsonic flow [J]. | AEROSPACE SCIENCE AND TECHNOLOGY , 2021 , 119 . |
| MLA | Guo, Xiangying et al. "Nonlinear dynamics of Z-shaped morphing wings in subsonic flow" . | AEROSPACE SCIENCE AND TECHNOLOGY 119 (2021) . |
| APA | Guo, Xiangying , Wang, Songsong , Qu, Yegao , Cao, Dongxing . Nonlinear dynamics of Z-shaped morphing wings in subsonic flow . | AEROSPACE SCIENCE AND TECHNOLOGY , 2021 , 119 . |
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摘要 ：
In this work, the graphene composite sheets coated with metal were equivalent to composite laminated sheets. The nonlinear coupling vibrations of graphene composite laminated sheets (GCLSs) under particle impact were investigated. The size-dependent effect and viscoelasticity were incorporated to model GCLSs in the nonlocal continuum theory and Kelvin-Voigt model framework. Particle impact was regarded as stochastic excitation on the GCLS. According to the von Karman strain-displacement relationship for the geometric nonlinearity and Reddy's third-order shear deformation plate theory, the nonlinear governing partial differential equations were derived. To examine the validity of this model, a comparison with published results was carried out. With the purpose of ensuring the convergence and reliability of the results, a large number of mode truncations were performed. The emphasis of numerical simulations was placed on studying how the various factors, including the size-dependent effect, forcing amplitude, and viscoelasticity, influencing the nonlinear responses of GCLS. The motivation of this study is to present a novel model providing both practical and theoretical guidance for devices involving graphene composites subjected to particle impacts.
关键词 ：
Nonlinear coupling vibrations Nonlinear coupling vibrations Viscoelasticity Viscoelasticity Graphene composite laminated sheet Graphene composite laminated sheet Size-dependent effect Size-dependent effect
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| GB/T 7714 | Wu, Qiliang , Yao, Minghui , Li, Mingyuan et al. Nonlinear coupling vibrations of graphene composite laminated sheets impacted by particles [J]. | APPLIED MATHEMATICAL MODELLING , 2021 , 93 : 75-88 . |
| MLA | Wu, Qiliang et al. "Nonlinear coupling vibrations of graphene composite laminated sheets impacted by particles" . | APPLIED MATHEMATICAL MODELLING 93 (2021) : 75-88 . |
| APA | Wu, Qiliang , Yao, Minghui , Li, Mingyuan , Cao, Dongxing , Bai, Bin . Nonlinear coupling vibrations of graphene composite laminated sheets impacted by particles . | APPLIED MATHEMATICAL MODELLING , 2021 , 93 , 75-88 . |
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摘要 ：
Vibration energy harvesters (VEHs) can transform ambient vibration energy to electricity and have been widely investigated as promising self-powered devices for wireless sensor networks, wearable sensors, and applications of a micro-electro-mechanical system (MEMS). However, the ambient vibration is always too weak to hinder the high energy conversion efficiency. In this paper, the integrated frame composed of piezoelectric beams and mechanical amplifiers is proposed to improve the energy conversion efficiency of a VEH. First, the initial structures of a piezoelectric frame (PF) and an amplification frame (AF) are designed. The dynamic model is then established to analyze the influence of key structural parameters on the mechanical amplification factor. Finite element simulation is conducted to study the energy harvesting performance, where the stiffness characteristics and power output in the cases of series and parallel load resistance are discussed in detail. Furthermore, piezoelectric beams with variable cross-sections are introduced to optimize and improve the energy harvesting efficiency. Advantages of the PF with the AF are illustrated by comparison with conventional piezoelectric cantilever beams. The results show that the proposed integrated VEH has a good mechanical amplification capability and is more suitable for low-frequency vibration conditions.
关键词 ：
amplification frame (AF) amplification frame (AF) mechanical amplifier mechanical amplifier O326 O326 piezoelectric frame (PF) piezoelectric frame (PF) variable cross-section beam variable cross-section beam vibration energy harvesting vibration energy harvesting
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| GB/T 7714 | Duan, Xiangjian , Cao, Dongxing , Li, Xiaoguang et al. Design and dynamic analysis of integrated architecture for vibration energy harvesting including piezoelectric frame and mechanical amplifier [J]. | APPLIED MATHEMATICS AND MECHANICS-ENGLISH EDITION , 2021 , 42 (6) : 755-770 . |
| MLA | Duan, Xiangjian et al. "Design and dynamic analysis of integrated architecture for vibration energy harvesting including piezoelectric frame and mechanical amplifier" . | APPLIED MATHEMATICS AND MECHANICS-ENGLISH EDITION 42 . 6 (2021) : 755-770 . |
| APA | Duan, Xiangjian , Cao, Dongxing , Li, Xiaoguang , Shen, Yongjun . Design and dynamic analysis of integrated architecture for vibration energy harvesting including piezoelectric frame and mechanical amplifier . | APPLIED MATHEMATICS AND MECHANICS-ENGLISH EDITION , 2021 , 42 (6) , 755-770 . |
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