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contributor authorChen, Li
contributor authorJiang, Wen
contributor authorPanyam, Meghashyam
contributor authorDaqaq, Mohammed F.
date accessioned2017-05-09T01:34:57Z
date available2017-05-09T01:34:57Z
date issued2016
identifier issn1048-9002
identifier othervib_138_06_061007.pdf
identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/162977
description abstractThe objective of this paper is twofold: first to illustrate that nonlinear modal interactions, namely, a twotoone internal resonance energy pump, can be exploited to improve the steadystate bandwidth of vibratory energy harvesters; and, second, to investigate the influence of key system’s parameters on the steadystate bandwidth in the presence of the internal resonance. To achieve this objective, an Lshaped piezoelectric cantilevered harvester augmented with frequency tuning magnets is considered. The distance between the magnets is adjusted such that the second modal frequency of the structure is nearly twice its first modal frequency. This facilitates a nonlinear energy exchange between these two commensurate modes resulting in largeamplitude responses over a wider range of frequencies. The harvester is then subjected to a harmonic excitation with a frequency close to the first modal frequency, and the voltage–frequency response curves are generated. Results clearly illustrate an improved bandwidth and output voltage over a case which does not involve an internal resonance. A nonlinear model of the harvester is developed and validated against experimental findings. An approximate analytical solution of the model is obtained using perturbation methods and utilized to draw several conclusions regarding the influence of key design parameters on the harvester’s bandwidth.
publisherThe American Society of Mechanical Engineers (ASME)
titleA Broadband Internally Resonant Vibratory Energy Harvester
typeJournal Paper
journal volume138
journal issue6
journal titleJournal of Vibration and Acoustics
identifier doi10.1115/1.4034253
journal fristpage61007
journal lastpage61007
identifier eissn1528-8927
treeJournal of Vibration and Acoustics:;2016:;volume( 138 ):;issue: 006
contenttypeFulltext


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