Design, tuning and in-field validation of energy harvesters for railway bridges
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Título
Design, tuning and in-field validation of energy harvesters for railway bridgesAutoría
Fecha de publicación
2024Editor
ElsevierCita bibliográfica
CÁMARA-MOLINA, Javier Cristóbal, et al. Design, tuning and in-field validation of energy harvesters for railway bridges. Mechanical Systems and Signal Processing, 2024, vol. 208, p. 111012.Tipo de documento
info:eu-repo/semantics/articleVersión de la editorial
https://www.sciencedirect.com/science/article/pii/S0888327023009202Versión
info:eu-repo/semantics/publishedVersionPalabras clave / Materias
Resumen
Energy harvesters are a promising technology for powering infrastructure condition monitoring
systems without batteries. When deployed on railway bridges they are typically tuned to the
bridge’s natural frequency, ... [+]
Energy harvesters are a promising technology for powering infrastructure condition monitoring
systems without batteries. When deployed on railway bridges they are typically tuned to the
bridge’s natural frequency, however due to the dominance of train-induced forced vibration of
the structure, this results in sub-optimal energy harvesting. As a solution, this paper presents
a novel tuning strategy for energy harvesters on railway bridges. The strategy is based on a
statistical analysis of the mechanical energy generated in the bridge during train passage and
involves four steps: (i) measurement of bridge response due to train traffic, (ii) calculation
of mechanical energy during train passage, (iii) statistical characterisation of the energy
distribution, and finally, (iv) calculation of the tuning frequency. A case study is presented
to compare the potential of the proposed strategy against tuning based upon the bridge natural
frequency. First, an in-service railway bridge is monitored to determine its natural frequency
and response to train traffic. Combining the field data with the proposed tuning strategy, the
design of energy harvesters for the bridge is optimised. The design of harvesters tuned to natural
frequencies is also studied. The underlying harvester type is a cantilever bimorph beam with a
mass at the tip and load resistance. Additive manufacturing is used for the substructure, which
is formed from PAHT-CF15 (High Temperature Polyamide carbon fibre reinforcement). The
harvesters are manufactured and deployed on the bridge subject to live railway traffic. Field
results show the devices designed using the new tuning strategy harvest up to 300% more
energy. The energy harvested in a time window of three hours (18 train passages) is 7.65 mJ. [-]
Publicado en
Mechanical Systems and Signal Processing, 2024, vol. 208.Entidad financiadora
Ministerio de Ciencia, Innovación y Universidades | Ministerio de Ciencia e Innovación | Junta de Andalucía | Generalitat Valenciana | Centro Informático Científico de Andalucía (CICA)
Código del proyecto o subvención
PID2019-109622RB | PID2022-138674OB | PROYEXCEL_00659 | AICO/2021/200
Derechos de acceso
info:eu-repo/semantics/openAccess
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