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<p>This paper presents the design and experimental validation of a vibrating energy harvester for railway bridge applications. The harvester is based on a piezoelectric material, PZT-5J, integrated into a coated aluminum beam substructure, which captures residual mechanical vibrations generated by trains passing over the bridge. The main novelty of this work is the study of the contribution of geometrically nonlinear vibrations to the voltage output. For this purpose, both experimental data and probabilistic results from a numerical tool integrating finite element and Monte Carlo methods are analyzed. Finally, it is observed that the energy production increases quadratically for the second nonlinear harmonic, which could be exploited in future harvester designs.</p>

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Effects of geometric nonlinearity on the performance of piezoelectric energy harvesters applied to railway bridges

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年5月9日

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  • Roberto Palma,
  • Antonio Callejas,
  • Esther Puertas,
  • Rafael Castro,
  • Rafael Gallego

摘要

This paper presents the design and experimental validation of a vibrating energy harvester for railway bridge applications. The harvester is based on a piezoelectric material, PZT-5J, integrated into a coated aluminum beam substructure, which captures residual mechanical vibrations generated by trains passing over the bridge. The main novelty of this work is the study of the contribution of geometrically nonlinear vibrations to the voltage output. For this purpose, both experimental data and probabilistic results from a numerical tool integrating finite element and Monte Carlo methods are analyzed. Finally, it is observed that the energy production increases quadratically for the second nonlinear harmonic, which could be exploited in future harvester designs.