Nonlinear dynamic analysis of asymmetric tristable energy harvesters for enhanced energy harvesting

Zhou, Shengxi; Zuo, Lei

doi:10.1016/j.cnsns.2018.02.017

Cited by 383 publications

(144 citation statements)

References 31 publications

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“…Recently, in order to obtain stronger and more standard eddy current, Pan et al [29] studied a circular cylinder with an opening and concave surface through experiment and simulation, which simulates two kinds of vortex type systems, respectively, by using two kinds of vortex generator. The results indicate an increase of the induction frequency of the modified cylinder from 2.7 to 2.9 Hz and the peak voltage from 0.35 to 0.41 V. At present, as the derivation direction of vortex-induced vibration with bionic structure becomes more and more diverse, a large number of scholars commit themselves to exploring the nonlinearity [30][31][32][33], multi-degree of freedom [34], and multicylinder string juxtaposition [35][36][37]. To sum up, the bionic structure is indeed a feasible and effective method to improve the bandwidth and output voltage of the energy harvester based on vortex-induced vibration.…”

Section: Introductionmentioning

confidence: 99%

Design, Modeling, and Experiments of the Vortex‐Induced Vibration Piezoelectric Energy Harvester with Bionic Attachments

Jin

Wang

et al. 2019

Complexity

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Since the energy demand increases, the sources of fluid energy such as wind energy and marine energy have attracted widespread attention, especially vortex-induced vibrations excited by wind energy. It is well known that the lock-in effect in vortex-induced vibration can be applied to the piezoelectric energy harvester. Although numerous researches have been conducted on piezoelectric energy harvesting devices in recent years, a common problem of low bandwidth and harvesting efficiency still exists. In order to increase the response amplitude and decrease the threshold wind speed of vortex-induced vibration, a bionic attachment structure is proposed based on the experimental method. In the present work, twelve models are designed according to the size of pits and hemispheric protrusions which are added to the surface of a flexible smooth cylinder. Compared with the smooth cylinder which is taken as a carrier, the harvester with the bionic structure shows stronger energy capture performance on the whole. As the threshold speed decelerates from 1.8m/s to 1 m/s, the bandwidth, on the contrary, increases from 39.3% to 51.4%. Particularly, for the 10 mm pits structure with 5 columns, its peak voltage can reach 47 V, and its peak power can reach 1.21 mW with a resistance of 800 kΩ, 0.57 mW higher than that of the smooth cylinder. Comparatively speaking, the hemispherical projections structure figures with a much more different energy capturing characteristic. Starting from the column, the measured voltage of the hemispherical bionic harvester is much smaller than that of the smooth cylinder, with a peak voltage less than 15 V and a reducing bandwidth. However, compared with the smooth cylinder, hemispheric projections with 3 columns have a better energy capture effect with a measured voltage of 35V, a resistance of 800kΩ, and a wind speed of 3.097 m/s. Besides, its output power also enhances from 0.48 to 0.56 mW.

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Section: Introductionmentioning

confidence: 99%

Design, Modeling, and Experiments of the Vortex‐Induced Vibration Piezoelectric Energy Harvester with Bionic Attachments

Jin

Wang

et al. 2019

Complexity

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“…[8][9][10] On the other hand, various performance enhancement methods for vibration energy harvesting have been extensively explored, including using multimodal techniques, nonlinear mechanisms, and active tuning strategies. [11][12][13][14][15][16][17] Fluid flow ubiquitously exists in the environment and could be converted to structural vibrations. 18,19 Based on the mechanism of flow-induced vibration, researchers have proposed various aeroelastic PEHs.…”

Section: Introductionmentioning

confidence: 99%

Bluff body with built‐in piezoelectric cantilever for flow‐induced energy harvesting

Zhang

Wang

2020

Int J Energy Res

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Summary This paper investigates a flow‐induced vibration energy harvester comprising a piezoelectric beam (piezo‐beam) installed within a hollow circular cylinder. Under the flow excitation, the energy‐harvesting system including the cylinder and the piezo‐beam vibrates and generates electricity. A lumped parametric model incorporating the fluid‐structure interaction (FSI) is developed to evaluate the performance of the proposed energy harvester. Based on the theoretical analysis, several guidelines on the design and optimization of the proposed energy harvester are provided. Subsequently, a numerical model is used to simulate the FSI between the proposed system and the external flow field. Finally, a physical prototype is fabricated and an experiment is conducted to test the actual performance for validation. The theoretical analysis results are verified by the numerical and experimental results.

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“…Thus, other than producing inhomogeneous, complex deformation of free standing MAE samples, itʼs also desirable to render materials with the ability of responding or deforming diversely in time. In previous works, a most famous and straightforward way to diversify the temporal responses of a system is to introduce nonlinear dynamics (Qian et al 2019, Kim and Seok 2014, Zhou and Zuo 2018, Zhou et al 2017. But, it often requires a complex structural design and usually works for certain frequencies.…”

Section: Introductionmentioning

confidence: 99%

Diversifying temporal responses of magnetoactive elastomers

Tan

Wen

Gong

et al. 2020

Mater. Res. Express

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Magnetoactive elastomers(MAEs) are able to deform significantly in response to the application of magnetic fields. Usually, a magnetic field which is harmonic in time usually results in a harmonic mechanical response of the MAEs. To render MAEs with the ability of responding or deforming diversely or anharmonically in time, in this work, we propose a hybrid MAE which is based on a rubber matrix embedded with both soft iron particles and hard NdFeB-alloy particles. Firstly, based on the principle of minimum free energy, we establish a theoretical model to study magnetomechanical behaviors of the proposed hybrid MAEs. Then, through both theoretical and experimental studies, we show that the response of a hybrid MAE sample to the applied magnetic field is usually complex, i.e. the deformation induced by a harmonic magnetic field in time is anharmonic. At last, the effect of two main factors, the state of magnetization and the amplitude of the applied magnetic field, is studied both experimentally and theoretically. This work provides a new idea of diversifying the temporal response of MAEs to the application of harmonic magnetic fields (harmonic in time). The hybrid MAEs may serve as a complement to the recently proposed 3D-printed hard MAEs which are able to deform inhomogeneously in space in response to a uniform magnetic field.

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Nonlinear dynamic analysis of asymmetric tristable energy harvesters for enhanced energy harvesting

Cited by 383 publications

References 31 publications

Design, Modeling, and Experiments of the Vortex‐Induced Vibration Piezoelectric Energy Harvester with Bionic Attachments

Design, Modeling, and Experiments of the Vortex‐Induced Vibration Piezoelectric Energy Harvester with Bionic Attachments

Bluff body with built‐in piezoelectric cantilever for flow‐induced energy harvesting

Diversifying temporal responses of magnetoactive elastomers

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