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学者姓名：郭翔鹰
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Abstract ：
To better suppress low-frequency vibrations of flexible manipulators induced by the rotation of motors and eccentricity, a novel type of tuned particle damper (TPD) is designed by combining the advantages of classical dynamic vibration absorber (DVA) and particle dampers (PD). Compared to traditional DVAs, this TPD can reduce additional mass and effectively broaden the frequency band of the DVA. Firstly, an equivalent theoretical model is established to describe the frequency tuning principle of the designed TPD. Based on the theory of a single particle damper, the equivalent damping and stiffness of the particles are calculated through an approximate approach. Then, a three-degree-of-freedom vibration model of the manipulator system with the TPD is built, and the dynamical characteristic of the primary resonance for the coupled system are analyzed by the perturbation method. Finally, the experimental platform is set up to verify the theoretical results. A manipulator is applied to test the low-frequency vibration absorption of the designed TPD, and the vibration suppression effect is discussed both in theoretical analysis and experiments.
Keyword ：
variable stiffness variable stiffness vibration control vibration control tuned particle damper tuned particle damper Particles Particles
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| GB/T 7714 | Zhu, Yunan , Cao, Dongxing , Luo, Zhong et al. Theoretical and Experimental Analysis on Vibration Absorber with Particle Damping [J]. | INTERNATIONAL JOURNAL OF STRUCTURAL STABILITY AND DYNAMICS , 2023 , 23 (20) . |
| MLA | Zhu, Yunan et al. "Theoretical and Experimental Analysis on Vibration Absorber with Particle Damping" . | INTERNATIONAL JOURNAL OF STRUCTURAL STABILITY AND DYNAMICS 23 . 20 (2023) . |
| APA | Zhu, Yunan , Cao, Dongxing , Luo, Zhong , Guo, Xiangying . Theoretical and Experimental Analysis on Vibration Absorber with Particle Damping . | INTERNATIONAL JOURNAL OF STRUCTURAL STABILITY AND DYNAMICS , 2023 , 23 (20) . |
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Abstract ：
Energy harvesting induced from flowing fluids (e.g., air and water flows) is a well-known process, which can be regarded as a sustainable and renewable energy source. In addition to traditional high-efficiency devices (e.g., turbines and watermills), the micro-power extracting technologies based on the flow-induced vibration (FIV) effect have sparked great concerns by virtue of their prospective applications as a self-power source for the microelectronic devices in recent years. This article aims to conduct a comprehensive review for the FIV working principle and their potential applications for energy harvesting. First, various classifications of the FIV effect for energy harvesting are briefly introduced, such as vortex-induced vibration (VIV), galloping, flutter, and wake-induced vibration (WIV). Next, the development of FIV energy harvesting techniques is reviewed to discuss the research works in the past three years. The application of hybrid FIV energy harvesting techniques that can enhance the harvesting performance is also presented. Furthermore, the nonlinear designs of FIV-based energy harvesters are reported in this study, e.g., multi-stability and limit-cycle oscillation (LCO) phenomena. Moreover, advanced FIV-based energy harvesting studies for fluid engineering applications are briefly mentioned. Finally, conclusions and future outlook are summarized.
Keyword ：
vibration-driven energy harvesting vibration-driven energy harvesting O326 O326 flow-induced vibration (FIV) flow-induced vibration (FIV) nonlinear design nonlinear design piezoelectric approach piezoelectric approach
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| GB/T 7714 | Cao, Dongxing , Wang, Junru , Guo, Xiangying et al. Recent advancement of flow-induced piezoelectric vibration energy harvesting techniques: principles, structures, and nonlinear designs [J]. | APPLIED MATHEMATICS AND MECHANICS-ENGLISH EDITION , 2022 , 43 (7) : 959-978 . |
| MLA | Cao, Dongxing et al. "Recent advancement of flow-induced piezoelectric vibration energy harvesting techniques: principles, structures, and nonlinear designs" . | APPLIED MATHEMATICS AND MECHANICS-ENGLISH EDITION 43 . 7 (2022) : 959-978 . |
| APA | Cao, Dongxing , Wang, Junru , Guo, Xiangying , Lai, S. K. , Shen, Yongjun . Recent advancement of flow-induced piezoelectric vibration energy harvesting techniques: principles, structures, and nonlinear designs . | APPLIED MATHEMATICS AND MECHANICS-ENGLISH EDITION , 2022 , 43 (7) , 959-978 . |
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Abstract ：
Advances in the design of various piezoelectric vibration-based energy harvesters (PVEHs), as a kind of power devices that can convert ambient energy to useable electrical energy, have become a hot topic in recent years due to their potential perspectives in wireless sensor networks, wearable electronics and low-power microelectronics. Unfortunately, conventional PVEHs modelled by beam- or plate-type planar structures are mainly restricted to harness kinetic energy in a single direction only. However, ambient vibration sources often work in multiple directions and broadband frequencies. To address this challenging problem, a mechanically-guided three-dimensional (3D) assembly structure is strategically designed to construct a soft cruciform-encapsulated PVEH in this work. Meanwhile, a reliable soft encapsulation technology is introduced to maintain the 3D configuration, which not only can avoid the collapse problem and also improve the dynamical performance. The entire system consists of a compressive buckling cruciform structure with a proof mass, PVDF thin film, and soft encapsulation. The dynamic characteristics of the system can be adjusted by changing the structural parameters, such as the pre-stressing force of the pre-stretched elastic substrate and the quality of the additional mass block. Finite element analysis and experimental studies are conducted to investigate the modal characteristics of system. A comparison of the vibration energy harvesting performance between the encapsulated and unencapsulated piezoelectric harvesters is presented. The results demonstrate that the encapsulated one can work well under multi-directional, multi-modal and low-frequency conditions. A maximum power output of 9.8 mW in the frequency range of 1e20 0 Hz can be achieved, which is almost 560 times more than that of the unencapsulated one. The proposed methodology also offers a new perspective for the fabrication design of soft-type PVEHs with higher working performance.(c) 2022 Elsevier Ltd. All rights reserved.
Keyword ：
Vibration energy harvesting Vibration energy harvesting Mechanically-guided assembly Mechanically-guided assembly Multiple directions Multiple directions Soft encapsulation Soft encapsulation Wide bandwidth Wide bandwidth
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| GB/T 7714 | Cao, Dong-Xing , Lu, Yi-Ming , Lai, Siu-Kai et al. A novel soft encapsulated multi-directional and multi-modal piezoelectric vibration energy harvester [J]. | ENERGY , 2022 , 254 . |
| MLA | Cao, Dong-Xing et al. "A novel soft encapsulated multi-directional and multi-modal piezoelectric vibration energy harvester" . | ENERGY 254 (2022) . |
| APA | Cao, Dong-Xing , Lu, Yi-Ming , Lai, Siu-Kai , Mao, Jia-Jia , Guo, Xiang-Ying , Shen, Yong-Jun . A novel soft encapsulated multi-directional and multi-modal piezoelectric vibration energy harvester . | ENERGY , 2022 , 254 . |
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Abstract ：
Piezoelectric-based energy harvesting techniques offer a promising way to transform vibration energy into electric energy. However, many vibration energy harvesters (VEH) can only work under narrow bandwidths and limited high frequencies to restrict their working performance. In this paper, a vibro-impact piezoelectric VEH is proposed, where a partial interlayer-separated piezoelectric beam is designed to improve the voltage output and frequency bandwidth of the VEH. First, the mechanism of the proposed VEH is introduced and the electromechanical model is derived based on the Euler-Bernoulli beam theory and vibro-impact dynamic model. Voltage-frequency responses are then obtained by using an approximate analytical method. In addition, the effect of partial interlayer-separated piezoelectric beams on the energy harvesting performance is investigated numerically. A parametric study is performed to investigate the influence of system parameters on the voltage output in terms of bandwidth and magnitude. Finally, the theoretical solutions are validated by experimental results, the voltage output of the proposed VEH is higher than the non-impact type. The maximum output power of the proposed VEH is about 12 times more than that of the conventional one under a 0.2 g acceleration. Due to the good agreement of the variation trend between the theoretical values and experiment results, the proposed partial interlayer-separated beam VEH can be used for a further optimization of the vibration energy harvester.
Keyword ：
vibro-impact vibro-impact Vibration energy harvesting Vibration energy harvesting partial interlayer-separated piezoelectric beam partial interlayer-separated piezoelectric beam low-frequency vibration low-frequency vibration wide bandwidth wide bandwidth
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| GB/T 7714 | Cao, Dong-Xing , Xia, Wei , Guo, Xiang-Ying et al. Modeling and experiment of vibro-impact vibration energy harvester based on a partial interlayer-separated piezoelectric beam [J]. | JOURNAL OF INTELLIGENT MATERIAL SYSTEMS AND STRUCTURES , 2021 , 32 (8) : 817-831 . |
| MLA | Cao, Dong-Xing et al. "Modeling and experiment of vibro-impact vibration energy harvester based on a partial interlayer-separated piezoelectric beam" . | JOURNAL OF INTELLIGENT MATERIAL SYSTEMS AND STRUCTURES 32 . 8 (2021) : 817-831 . |
| APA | Cao, Dong-Xing , Xia, Wei , Guo, Xiang-Ying , Lai, Siu-Kai . Modeling and experiment of vibro-impact vibration energy harvester based on a partial interlayer-separated piezoelectric beam . | JOURNAL OF INTELLIGENT MATERIAL SYSTEMS AND STRUCTURES , 2021 , 32 (8) , 817-831 . |
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Abstract ：
Piezoelectric vibration energy harvesting has attracted considerable attention because of its prospects in self-powered electronic applications. There are a many low-velocity waters in nature, such as rivers, seas and oceans, which contain abundant hydrokinetic energy. In this paper, an optimal geometric piezoelectric beam combining magnetic excitation is identified and applied to a vortex-induced vibration energy harvester (ViVEH) for low velocity water flow, which is composed of a continuous variable-width piezoelectric beam carrying a cylindrical bluff body. The finite element simulation and experiment are first carried out to study the harvesting characteristics of the designed variable-width beam ViVEH without considering the magnetic excitation. The influence of the width-ratio and flow velocity on the harvesting voltage is studied in detail. The optimal structure, a ViVEH equipped with triangular piezoelectric beam, is then obtained by the superior energy harvesting performance for low velocity water flow. From the experimental results, at a flow velocity of 0.6 m/s, the highest root mean square (RMS) voltage and RMS voltage per unit area are 19.9 V and 0.07 V/mm(2), respectively. Furthermore, magnetic excitation is introduced to improve the scavenging performance of the optimal triangular beam ViVEH, different polarity arrangements are compared, and the optimal case, the arrangement of horizontal repulsion and vertical attraction (HR-VA), is obtained. This case can scavenge the highest power of 173 mu W at a flow velocity of 0.5 m/s, which is increased by 127% compared to a conventional constant-width beam ViVEH with no magnetic excitation.
Keyword ：
Variable-width piezoelectric beam Variable-width piezoelectric beam Energy harvesting Energy harvesting Low velocity flow Low velocity flow Magnetic force enhancement Magnetic force enhancement Vortex-induced vibration Vortex-induced vibration
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| GB/T 7714 | Cao, Dongxing , Ding, Xiangdong , Guo, Xiangying et al. Design, Simulation and Experiment for a Vortex-Induced Vibration Energy Harvester for Low-Velocity Water Flow [J]. | INTERNATIONAL JOURNAL OF PRECISION ENGINEERING AND MANUFACTURING-GREEN TECHNOLOGY , 2020 , 8 (4) : 1239-1252 . |
| MLA | Cao, Dongxing et al. "Design, Simulation and Experiment for a Vortex-Induced Vibration Energy Harvester for Low-Velocity Water Flow" . | INTERNATIONAL JOURNAL OF PRECISION ENGINEERING AND MANUFACTURING-GREEN TECHNOLOGY 8 . 4 (2020) : 1239-1252 . |
| APA | Cao, Dongxing , Ding, Xiangdong , Guo, Xiangying , Yao, Minghui . Design, Simulation and Experiment for a Vortex-Induced Vibration Energy Harvester for Low-Velocity Water Flow . | INTERNATIONAL JOURNAL OF PRECISION ENGINEERING AND MANUFACTURING-GREEN TECHNOLOGY , 2020 , 8 (4) , 1239-1252 . |
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Abstract ：
Vibration energy harvesting has attracted considerable attention because of its application prospects for charging or powering micro-electro-mechanical system. Abundant hydrokinetic energy of water at low velocity is contained in the fluid environment, such as rivers and oceans, which are widely existing in nature. In this paper, a flow-induced piezoelectric vibration energy harvester (PVEH) with magnetic force enhancement, which is integrated by piezoelectric beam, circular cylinder bluff body and magnets, is proposed and experimental investigated. It could transfer the hydrokinetic energy, both the vortex-induced vibration and magnetic force excitation underwater, into electricity. First, the frequency sweep experiment of the piezoelectric cantilever beam is carried out to determine the resonance frequency where the effect of magnetic force on the vibration characteristic is obtained. Furthermore, the flow-induced vibration experiment platform is setup and the energy harvesting performance of the PVEH is investigated in detail. The effects of the magnet property, flow velocity and the magnetic poles distance on the vibration frequency and the acquisition voltage are demonstrated and discussed. The results show that it could improve the harvesting performance by introducing magnetic force. It has advantages in higher output voltage for the flow-induced PVEH, especially in low velocity water flow, when the flow velocity is 0.35 m/s, the PVEH under attractive magnetic force with magnetic distance of 20 mm scavenges the higher acquisition voltage of 5.2 V, which is increased by 225% than the PVEH with non-magnetic. The results can be applied to guide further fabrication process and optimized design of the proposed flow-induced PVEH underwater with low flow velocity.
Keyword ：
Piezoelectric beam Piezoelectric beam Magnetic force enhancement Magnetic force enhancement Vibration energy harvesting Vibration energy harvesting Flow-induced vibration Flow-induced vibration
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| GB/T 7714 | Cao, Dongxing , Ding, Xiangdong , Guo, Xiangying et al. Improved Flow-Induced Vibration Energy Harvester by Using Magnetic Force: An Experimental Study [J]. | INTERNATIONAL JOURNAL OF PRECISION ENGINEERING AND MANUFACTURING-GREEN TECHNOLOGY , 2020 , 8 (3) : 879-887 . |
| MLA | Cao, Dongxing et al. "Improved Flow-Induced Vibration Energy Harvester by Using Magnetic Force: An Experimental Study" . | INTERNATIONAL JOURNAL OF PRECISION ENGINEERING AND MANUFACTURING-GREEN TECHNOLOGY 8 . 3 (2020) : 879-887 . |
| APA | Cao, Dongxing , Ding, Xiangdong , Guo, Xiangying , Yao, Minghui . Improved Flow-Induced Vibration Energy Harvester by Using Magnetic Force: An Experimental Study . | INTERNATIONAL JOURNAL OF PRECISION ENGINEERING AND MANUFACTURING-GREEN TECHNOLOGY , 2020 , 8 (3) , 879-887 . |
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Abstract ：
Phononic crystal could be used in the vibration energy harvesting devices as its capacity to modulate elastic wave propagation. This paper presents a piezoelectric phononic crystal cantilever beam with periodic variable thicknesses for vibration energy harvesting. The transfer matrix method (TMM) is introduced to analyze the natural frequencies and the band structure of the phononic crystal beam. The influences of structural parameters, such as thicknesses-ratio and lengths-ratio, on the natural frequencies and first band gap of the beam are investigated in detail. The results of first two band gap ranges obtained via the TMM are validated by means of the finite element method (FEM) simulation. Moreover, the electromechanical coupling responses of the phononic crystal beam are explored by using the FEM simulation. The results demonstrate that the piezoelectric phononic crystal beam has more efficient voltage output in the first band gap comparing with the uniform piezoelectric cantilever beam. In conclusion, the proposed piezoelectric phononic crystal beam can extend the bandwidth of the energy harvester in low-frequency vibrations.
Keyword ：
piezoelectric phononic crystal beam piezoelectric phononic crystal beam vibration energy harvesting vibration energy harvesting transfer matrix method transfer matrix method band gap band gap
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| GB/T 7714 | Cao, Dongxing , Hu, Wenhua , Gao, Yanhui et al. Vibration and energy harvesting performance of a piezoelectric phononic crystal beam [J]. | SMART MATERIALS AND STRUCTURES , 2019 , 28 (8) . |
| MLA | Cao, Dongxing et al. "Vibration and energy harvesting performance of a piezoelectric phononic crystal beam" . | SMART MATERIALS AND STRUCTURES 28 . 8 (2019) . |
| APA | Cao, Dongxing , Hu, Wenhua , Gao, Yanhui , Guo, Xiangying . Vibration and energy harvesting performance of a piezoelectric phononic crystal beam . | SMART MATERIALS AND STRUCTURES , 2019 , 28 (8) . |
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Abstract ：
In this paper, a experimental model of morphing swept-wing with carbon fiber is designed and driven by Macro-Fiber Composites (MFC). Dynamic analysis of the wing structure is carried out. The maximum twist angle of the carbon fiber structure driven by the MFC in the experiment is 10.72 degrees. External excitation can be applied to the wing structure for its dynamic analysis and the modal performance of the structure is analyzed.
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| GB/T 7714 | Guo, Xiangying , Wang, Shuaibo , Zhang, Wei . Experimental Exploration of Macro-fiber Composite Morphing Wing [C] . 2019 . |
| MLA | Guo, Xiangying et al. "Experimental Exploration of Macro-fiber Composite Morphing Wing" . (2019) . |
| APA | Guo, Xiangying , Wang, Shuaibo , Zhang, Wei . Experimental Exploration of Macro-fiber Composite Morphing Wing . (2019) . |
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Abstract ：
In recent years, the morphing wing, which is able to improve the lift drag characteristics of the aircraft by changing wingspans and aspect ratios, has become a popular research issue. However, aeroelasticity is still a bottleneck for the development of morphing wings. The development of the aerodynamic calculations of deploying wings in subsonic air flow will be further promoted by this research. In this paper, we consider the aerodynamics of a deploying wing and investigate the nonlinear dynamic behaviors of the deploying wing. Under the flow condition of ideal incompressible fluid, the flow field is a potential field and the potential function must satisfy the Laplace linear equation and the superposition principle. When the thickness, curvature and angle of attack of the airfoil are small, the thin airfoil theory can be used to calculate the effects of the mean camber line to obtain the circulation distribution of the deploying wings in subsonic air flow. The steady aerodynamic lift on the deploying wing is derived by using the Kutta-joukowski lift theory. Then, the aerodynamic lift is applied on a deploying wing, which is modeled as a cantilevered thin shell deploying in the axial direction. The nonlinear partial differential governing equations of motion for the deploying cantilevered thin shell subjected to the aerodynamic force in subsonic air flow are established based on Hamilton's principle. The time-varying dependent vibration mode-shape functions are chosen using the boundary conditions, and then the Galerkin method is employed to transform the partial differential equation into two time-varying nonlinear ordinary differential equations. Numerical simulations are performed for the nonlinear dynamic responses of the deploying wing subjected to the aerodynamic force, and then the influence of different parameters, including the extending velocity and disturbance velocity, on the stability of the wing are analyzed. The effects of deploying velocities on the nonlinear vibrations of the first-order and second-order modes for the deploying wing are studied. (C) 2017 Elsevier Ltd. All rights reserved.
Keyword ：
Aerodynamic force Aerodynamic force Extending velocity Extending velocity Deploying cantilevered shell Deploying cantilevered shell Disturbance velocity Disturbance velocity Nonlinear dynamics Nonlinear dynamics
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| GB/T 7714 | Zhang, Wei , Chen, Lu-Lu , Guo, Xiang-Ying et al. Nonlinear dynamical behaviors of deploying wings in subsonic air flow [J]. | JOURNAL OF FLUIDS AND STRUCTURES , 2017 , 74 : 340-355 . |
| MLA | Zhang, Wei et al. "Nonlinear dynamical behaviors of deploying wings in subsonic air flow" . | JOURNAL OF FLUIDS AND STRUCTURES 74 (2017) : 340-355 . |
| APA | Zhang, Wei , Chen, Lu-Lu , Guo, Xiang-Ying , Sun, Lin . Nonlinear dynamical behaviors of deploying wings in subsonic air flow . | JOURNAL OF FLUIDS AND STRUCTURES , 2017 , 74 , 340-355 . |
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