Harvesting energy from the vibration of a passing train using a single-degree-of-freedom oscillator
Data
2016-01-01
Autores
Gatti, G.
Brennan, M. J. [UNESP]
Tehrani, M. G.
Thompson, D. J.
Título da Revista
ISSN da Revista
Título de Volume
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Resumo
With the advent of wireless sensors, there has been an increasing amount of research in the area of energy harvesting, particularly from vibration, to power these devices. An interesting application is the possibility of harvesting energy from the track-side vibration due to a passing train, as this energy could be used to power remote sensors mounted on the track for strutural health monitoring, for example. This paper describes a fundamental study to determine how much energy could be harvested from a passing train. Using a time history of vertical vibration measured on a sleeper, the optimum mechanical parameters of a linear energy harvesting device are determined. Numerical and analytical investigations are both carried out. It is found that the optimum amount of energy harvested per unit mass is proportional to the product of the square of the input acceleration amplitude and the square of the input duration. For the specific case studied, it was found that the maximum energy that could be harvested per unit mass of the oscillator is about 0.25 J/kg at a frequency of about 17 Hz. The damping ratio for the optimum harvester was found to be about 0.0045, and the corresponding amplitude of the relative displacement of the mass is approximately 5 mm.
Descrição
Palavras-chave
Energy harvesting, Time-limited excitation, Train-induced vibration, Transient vibration
Como citar
Mechanical Systems and Signal Processing, v. 66-67, p. 785-792.