Dynamic Modal Analysis of a Passenger Bus: Theoretical and Numerical Studies

• Type: Article in International Scientific Journal
• Date: 2021

Authors

Lopes, R (Author) Other; Farahani, BV (Author) Other; de Melo, FQ (Author) Other; Ramos, NV (Author) Other; Moreira, PMGP (Author) Other

Journal

Title: Transportation Research Record: Journal of the Transportation Research Board

Vol. 2675

Pages: 264-279

Publisher: US National Research Council

Indexing

ISI Web of Knowledge - 0 Citations

Scopus - 0 Citations

Other information

Authenticus ID: P-00V-D9C

DOI: 10.1177/03611981211028863

Abstract (EN): The dynamic assessment of a passenger bus is of the highest importance when aiming at high safety standards and low emissions for environmental sustainability. This work studies the dynamic response of a bus considering its modal analysis, for which simple dynamic models were developed for fast determination of the lowest frequencies, mainly arising from the suspension flexibility. In addition, complex natural vibration modes, impossible to determine using simplified models, were calculated via finite element method (FEM) modeling. To study the tire elastic behavior, as the key link between the vehicle and the road, specific deformation models, leading to a stiffness matrix to be combined with that of the vehicle spring suspension at each wheel/axis, were developed. This study aims at proposing a set of mathematical formulations to describe the modal behavior of passenger buses in detail, which could be applicable in any other long vehicle with similar conditions. Two main factors are studied, namely the suspension and the tire deformation effect. An acceptable agreement was verified between the simplified approach and FEM model results for the evaluation of natural frequencies and associated modes.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 17