Vertical beam modal response in a broadband energy harvester. (December 2016)

• Record Type: Journal Article
• Authors: Litak, Grzegorz; Rysak, Andrzej; Borowiec, Marek; Scheffler, Michael; Gier, Joachim
• Is Part Of: Proceedings of the Institution of Mechanical Engineers. Volume 230:Number 4(2016:Dec.)
• Page Start: 541
• Page End: 552
• Publication Date: 2016-12
• Subjects: Non-linear vibrations -- broadband energy harvesting -- piezoceramic; Machinery, Dynamics of -- Periodicals; Machine design -- Periodicals; 621.815
• DOI: 10.1177/1464419316633565
• Languages: English
• ISSNs: 1464-4193

Abstract

We examined energy harvesting using a vertical composite laminate beam with an additional moving mass subjected to kinematic harmonic excitation. The gravity effect and the moving tip mass applied to the system cause considerable changes in effective spring-mass characteristics of the bending beam. Simultaneously, we observed dynamical beam damping by an additional degree of freedom and non-linear effects including friction between the moving mass and the beam structure. The experiments were performed on the beam excited kinematically by a shaker, while beam velocity measurements were made by a scanning laser vibrometer. We applied modal analysis in the limit of a fairly low excitation level. The selected modal vibrations are illustrated by corresponding output time series.