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Tailoring a Three-Layer Track Model to Delay Instability and Minimize Critical Velocity Effects at Very High Velocities

2025-08Artigo científico Acesso aberto
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dc.contributor.authorDimitrovová, Zuzana
dc.contributor.institutionDEC - Departamento de Engenharia Civil
dc.contributor.institutionFaculdade de Ciências e Tecnologia (FCT)
dc.contributor.pblMDPI - Multidisciplinary Digital Publishing Institute
dc.date.accessioned2025-10-07T21:57:28Z
dc.date.available2025-10-07T21:57:28Z
dc.date.issued2025-08
dc.descriptionThe EEA grant FBR_OC2_45: SMART\u2014Sustainable Maintenance and Rehabilitation of Railway Track is also acknowledged. Publisher Copyright: © 2025 by the author. Licensee MDPI, Basel, Switzerland.
dc.description.abstractThe aim of this paper is to tailor the geometry and material parameters of a three-layer railway track model to achieve favorable properties for the circulation of high-speed trains at very high velocities. The three layers imply that the model should have three critical velocities for resonance. However, in many cases, some of these values are missing and must be replaced by pseudo-critical values. Since no resonance occurs at pseudo-critical velocities, even in the absence of damping, deflections never reach infinity. By using optimization techniques, it is possible to adjust the model’s parameters, so that the increase in vibrations remains minimal and does not pose a real danger. In this way, circulation velocities could be extended beyond the critical value, thereby increasing the network capacity and, consequently, improving the competitiveness of rail transport compared to other modes of transportation, thus contributing to decarbonization. The presented results are preliminary and require further analysis and validation. Several optimization techniques are implemented, leading to the establishment of designs that already have rather high pseudo-critical velocities. Further research will show how these theoretical findings can be utilized in practice.en
dc.description.versionpublishersversion
dc.description.versionpublished
dc.format.extent5462416
dc.identifier.doi10.3390/infrastructures10080200
dc.identifier.issn2412-3811
dc.identifier.otherPURE: 131468952
dc.identifier.otherPURE UUID: 60d1b675-a0c4-45bc-a3d9-ca55d431871e
dc.identifier.otherScopus: 105014344699
dc.identifier.urihttp://hdl.handle.net/10362/189113
dc.identifier.urlhttps://www.scopus.com/pages/publications/105014344699
dc.language.isoeng
dc.peerreviewedyes
dc.relationFunding Information: info:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F50022%2F2020/PT
dc.subjectanalytical solution
dc.subjectcritical velocity
dc.subjectfalse critical velocity
dc.subjectinstability of a moving mass
dc.subjectintegral transforms
dc.subjectoptimization
dc.subjectpseudo-critical velocity
dc.subjecttransient vibrations
dc.subjectCivil and Structural Engineering
dc.subjectBuilding and Construction
dc.subjectGeneral Materials Science
dc.subjectGeotechnical Engineering and Engineering Geology
dc.subjectComputer Science Applications
dc.titleTailoring a Three-Layer Track Model to Delay Instability and Minimize Critical Velocity Effects at Very High Velocitiesen
dc.typejournal article
degois.publication.issue8
degois.publication.titleInfrastructures
degois.publication.volume10
dspace.entity.typePublication
rcaap.rightsopenAccess

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