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dc.contributor.authorRoca Cazorla, David
dc.contributor.authorPàmies Gómez, Teresa
dc.contributor.authorCante Terán, Juan Carlos
dc.contributor.authorLloberas Valls, Oriol
dc.contributor.authorOliver Olivella, Xavier
dc.contributor.otherUniversitat Politècnica de Catalunya. Doctorat en Enginyeria Mecànica, Fluids i Aeronàutica
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament d'Enginyeria Mecànica
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament de Física
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament d'Enginyeria Civil i Ambiental
dc.identifier.citationRoca, D. [et al.]. Experimental and numerical assessment of local resonance phenomena in 3D-printed acoustic metamaterials. "Journal of vibration and acoustics. Transactions of the ASME", Abril 2020, vol. 142, núm. 2, p. 021017:1-021017:19.
dc.description.abstractThe so called Locally Resonant Acoustic Metamaterials (LRAM) are a new kind of artificially engineered materials capable of attenuating acoustic waves. As the name suggests, this phenomenon occurs in the vicinity of internal frequencies of the material structure, and can give rise to acoustic bandgaps. One possible way to achieve this is by considering periodic arrangements of a certain topology (unit cell), smaller in size than the characteristic wavelength. In this context, a computational model based on a homogenization framework has been developed from which one can obtain the aforementioned resonance frequencies for a given LRAM unit cell design in the sub-wavelength regime, which is suitable for low-frequency applications. Aiming at validating both the proposed numerical model and the local resonance phenomena responsible for the attenuation capabilities of such materials, a 3D-printed prototype consisting of a plate with a well selected LRAM unit cell design has been built and its acoustic response to normal incident waves in the range between 500 and 2000 Hz has been tested in an impedance tube. The results demonstrate the attenuating capabilities of the proposed design in the targeted frequency range for normal incident sound pressure waves and also establish the proposed formulation as the fundamental base for the computational design of 3D-printed LRAM-based structures.
dc.format.extent19 p.
dc.rights© ASME
dc.rightsAttribution 4.0 International
dc.subjectÀrees temàtiques de la UPC::Enginyeria dels materials
dc.subjectÀrees temàtiques de la UPC::Física::Acústica
dc.subject.lcshNoise control
dc.subject.otherMaterials in vibration and acoustics
dc.subject.otherModal analysis
dc.subject.otherNoise control
dc.subject.otherSmart materials and structures
dc.titleExperimental and numerical assessment of local resonance phenomena in 3D-printed acoustic metamaterials
dc.subject.lemacSoroll -- Control
dc.contributor.groupUniversitat Politècnica de Catalunya. RMEE - Grup de Resistència de Materials i Estructures en l'Enginyeria
dc.contributor.groupUniversitat Politècnica de Catalunya. LEAM - Laboratori d'Enginyeria Acústica i Mecànica
dc.description.peerreviewedPeer Reviewed
dc.rights.accessOpen Access
dc.description.versionPostprint (author's final draft)
dc.relation.projectidinfo:eu-repo/grantAgreement/EC/H2020/874481/EU/Computational design and prototyping of acoustic metamaterials for tailored insulation of noise/METACOUSTIC
local.citation.authorRoca, D.; Pàmies, T.; Cante, J.C.; Lloberas-Valls, O.; Oliver, J.
local.citation.publicationNameJournal of vibration and acoustics. Transactions of the ASME

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