PSI - Issue 77

Available online at www.sciencedirect.com Structural Integrity Procedia 00 (2026) 000–000 Available online at www.sciencedirect.com ScienceDirect

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Procedia Structural Integrity 77 (2026) 550–558

© 2026 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of ICSI organizers In this work, the dynamic response of a reduced-scaled freight wagon model is investigated using a combined experimental– numerical framework. Natural frequencies were identified experimentally using both direct peak-picking on the experimental Power Spectral Densities (PSD) and Stochastic Subspace Identification (SSI) methods, while a finite element (FE) model was developed to replicate the observed modal behavior. The comparison between experimental and numerical results demonstrated good agreement, confirming the validity of the model. These findings establish a foundation for future assessment of damping strategies, including dry friction and viscoelastic systems, for improved freight wagon design. © 2026 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of ICSI organizers Keywords: FEM; Modal Analysis; Railway International Conference on Structural Integrity Influence of Damping Solutions on the Dynamic Response of Freight Wagons Job S. Silva 1 , Carolina Francisco 1 , Alexandre M. Low 1 , Daniel Jesus 1 , Christian J. Silva 1 , Tiago M. R. M. Domingues 1 , P.M.G.P. Moreira 1 , Paulo Alves 2 , Paulo Oliveira 2 , João Martins 2 , José Rebola 2 , Diogo Alexandre 2 , Ana Amorim 2 , Pedro Marques 2 1 INEGI, Institute of Science and Innovation in Mechanical Engineering and Industrial Engineering, Campus da FEUP, Rua Dr. Roberto Frias, 400, 4200-465 Porto, Portugal 2 MEDWAY Maintenance & Repair, S.A. Casal Marcos Ferreira, 2330-556 Entroncamento, Portugal. Abstract Structures subjected to random excitations require efficient vibration control to ensure safety and operational performance. This is particularly relevant for freight wagons, where heavy loads and demanding service conditions call for robust yet cost-effective suspension systems. Traditionally, dry friction damping has been the preferred solution due to its simplicity and durability. However, recent studies have proposed alternative approaches, such as viscoelastic and viscous damping, to enhance vibration attenuation and consistency over time.

2452-3216 © 2026 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of ICSI organizers

2452-3216 © 2026 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of ICSI organizers 10.1016/j.prostr.2026.01.070 Information classification: Internal