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Advances in Acoustics and Vibration
Volume 2018, Article ID 4692570, 10 pages
Research Article

Squeal Frequency of a Railway Disc Brake Evaluation by FE Analyses

Department of Industrial and Information Engineering, Second University of Naples, Via Roma 29, 81031 Aversa, Italy

Correspondence should be addressed to F. Caputo; ti.ainapmacinu@otupac.ocsecnarf

Received 20 November 2017; Revised 5 February 2018; Accepted 1 March 2018; Published 15 April 2018

Academic Editor: Kim M. Liew

Copyright © 2018 F. Cascetta et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


This paper deals with the development of a numerical model, based on the Finite Element (FE) theory for the prediction of the squeal frequency of a railway disc brake. The analytical background has been discussed and presented, as well as the most efficient methods for evaluating the system stability; the attention has been paid particularly to the complex eigenvalues method, which has been adopted within this paper to investigate the railway disc brake system. Numerical results have been compared with measurements from experimental tests in order to validate the proposed numerical approach. At the end of this work, a sensitivity analysis, aimed at understanding the effects of some physical parameters influencing the stability of the brake system and the squeal propensity, has been carried out.