PSI - Issue 37

Available online at www.sciencedirect.com Structural Integrity Procedia 00 (2019) 000 – 000 Available online at www.sciencedirect.com ScienceDirect

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Procedia Structural Integrity 37 (2022) 81–88

© 2022 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 Pedro Miguel Guimaraes Pires Moreira Abstract The promotion of use of enhanced the performant passenger transportation vehicles is a goal of governmental entities, as a way for a better environmental and sustainable life. Current trends of vehicle design and construction imply high safety requirements, as well as reduction of the environmental impact through lower energy consumption. The purpose of this work is to investigate the dynamic behavior, whether in-service or out-of-service, of a multi-body passenger bus articulated by a damping joint. The dynamic behavior of the chassis upon loading will be evaluated, and potential damage to the bus structure and the passenger safety will be evaluated. The numerical study is conducted to simulate a single-joint articulated urban bus model using Finite Element Method (FEM). Therefore, several computational analyses are performed in order to assess the influence of external loads on the natural frequencies of the structure. © 2022 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 Pedro Miguel Guimaraes Pires Moreira Keywords: FEM; Multibody Vehicles Dynamics; Aerodynamics Forces; Natural Frequencies; Modal Analysis. 1. Introduction Currently, the transport sector is in a progressive evolution in order to improve the efficiency of passenger transportation. Traditional internal combustion engine vehicles tend to become low rated in the marketplace, however, their application is retained as a result of their self-sufficiency. Progressively, electric vehicles are consolidating their preference. More recently, with a growing option towards electric power for environmental sustainability reasons, lighter structures should be designed. Due to internal habitability, the electric packs of batteries are fitted at the vehicle roof, which determines particular attention to its dynamic stability. The configuration of these bus structures demands a precise consideration in the field of natural frequencies and associated modes. In current procedures for structural modelling, the vehicle structure has some quasi-concentrate masses as the engine and other power units are conditioning the global dynamic behavior of the structure. The inclusion of considerable size and weight electric ICSI 2021 The 4th International Conference on Structural Integrity A Numerical Dynamic Analysis of a Multi-Body Bus Rogério Lopes*, Behzad V. Farahani, Francisco Q. de Melo, Nuno V. Ramos, Pedro M. G. P. Moreira INEGI, Institute of Science and Innovation in Mechanical Engineering and Industrial Engineering, Campus da FEUP, R. Dr. Roberto Frias 400, 4200-465 Porto, Portugal.

2452-3216 © 2022 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 Pedro Miguel Guimaraes Pires Moreira

2452-3216 © 2022 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 Pedro Miguel Guimaraes Pires Moreira 10.1016/j.prostr.2022.01.062