Energy harvesting in a nonlinear piezomagnetoelastic beam subjected to random excitation

被引：84

作者：

De Paula, Aline S. ^{[1
]}

Inman, Daniel J. ^{[2
]}

Savi, Marcelo A. ^{[3
]}

机构：

[1] Univ Brasilia, Dept Mech Engn, BR-70910900 Brasilia, DF, Brazil

[2] Univ Michigan, Dept Aerosp Engn, Ann Arbor, MI 48109 USA

[3] Univ Fed Rio de Janeiro, Dept Mech Engn, COPPE, BR-21941972 Rio De Janeiro, RJ, Brazil

来源：

MECHANICAL SYSTEMS AND SIGNAL PROCESSING | 2015年 / 54-55卷

关键词：

Piezoelectric material; Energy harvesting; Random excitation; Nonlinearities; VIBRATIONS;

D O I：

10.1016/j.ymssp.2014.08.020

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

This work addresses the influence of nonlinearities in energy harvesting from a piezomagnetoelastic structure subjected to random vibrations. Nonlinear equations of motion that describe the electromechanical system are given along with theoretical simulations. The numerical analysis presents a comparison between the voltage provided from a linear, nonlinear bistable and nonlinear monostable systems due to random vibration. Experimental performance of the generator exhibits qualitative agreement with the theory, showing an enhancement of piezoelectric power generation in a bistable system when it vibrates around both stable equilibrium points. A relationship between variations in the excitation and a bistable system response is established from numerical simulations, defining a region of enhanced power generation when compared to the linear and nonlinear monostable cases. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：405 / 416

页数：12

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