2024-11-192024-11-192024Cámara Molina, J.C., Romero Ordóñez, A., Galvín, P., Moliner, E. y Martínez-Rodrigo, M.D. (2024). Design and optimisation of 3D-printed energy harvesters for railway bridges. En 12th International Conference on Structural Dynamics, EURODYN 2023. Journal of Physics: Conference Series, Vol. 2647, 10 (102001-), Delft: IOP Publishing.1742-6588https://hdl.handle.net/11441/164556Content from this work may be used under the terms of theCreative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. Published under licence by IOP Publishing LtdThis paper investigates energy harvesting on railway bridges. The type of harvester studied is a cantilever bimorph beam with a mass at the tip and a load resistance. These parameters are adjusted to find the optimal design that tunes the harvester to the fundamental frequency of the bridge. An analytical model based on a variational formulation to represent the electromechanical behaviour of the device is presented. The optimisation problem is solved using a genetic algorithm with constraints of geometry and structural integrity. Additive manufacturing to 3D print energy harvesters is used to maximise design flexibility and energy performance. The proposed procedure is implemented in the design and manufacture of an energy harvesting device for a railway bridge on an in-service high-speed line. The structure under study corresponds to a six-arched concrete bridge with double ballasted track. The proposed design is experimentally validated and the performance under operating conditions is evaluated in a test field.application/pdf11 p.engAttribution 4.0 Internationalhttp://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/openAccess10.1088/1742-6596/2647/10/102001