IMPACT OF THE INITIAL CONDITIONS IN TIME INTEGRATION METHODS FOR SELF-EXCITED NONLINEAR VIBRATIONS: THE CASE OF RAILWAY CURVE SQUEAL

Jacobo Arango Montoya; Jean-Jacques Sinou; Olivier Chiello; Rita Tufano

Paper Title

Authors

Jacobo Arango Montoya
Jean-Jacques Sinou
Olivier Chiello
Rita Tufano

Modality

Onsite-Oral

Subject area

08.0. Ground Transportation and Industrial Noise: Detection, Mitigation and Modelling

Publishing Date

18/08/2025

Country of Publishing

Brazil | Brasil

Language of Publishing

Inglês

Paper Page

https://www.even3.com.br/anais/international-congress-exposition-noise-control-engineering/1074282-impact-of-the-initial-conditions-in-time-integration-methods-for-self-excited-nonlinear-vibrations--the-case-of-

ISBN

978-65-272-1573-8

Keywords

railway noise, curve squeal, friction-induced vibrations, nonlinear vibrations, time integration, initial conditions, limit cycle

Summary

Time integration of the dynamic equations that model railway curve squeal phenomenon is a commonly used method to determine the nonlinear self-sustained vibrations associated to this disturbing tonal noise. Although it is well known that the solutions obtained with time integration depend on the initial conditions used, their choice is often overlooked, mostly because it is implicitly assumed that the final limit cycle is independent of them. Moreover, the use of a modal description of the rail and wheel introduces some challenges when it comes to a physical understanding of the initial conditions. This study investigates their impact on a curve squeal model based on a modal reduction of the wheel by using two types of initial conditions, namely the modal and physical-based ones. Two families of limit cycles were obtained: low-amplitude cycles with a periodic regime and high-amplitude cycles with a quasi-periodic regime, where a strong harmonic coupling between the wheel modes is found. These results stress the importance of a reasonable choice of the initial conditions in order to produce more reliable and robust simulations. Future developments involving direct nonlinear methods for limit cycle determination could help deepen the understanding of the problem treated in the present study.

Title of the Event: Inter-Noise 2025
City of the Event: São Paulo
Title of the Proceedings of the event: Proceedings of the 54th International Congress and Exposition on Noise Control Engineering
Name of the Publisher: Even3
Means of Dissemination: Meio Digital

How to cite

MONTOYA, Jacobo Arango et al.. IMPACT OF THE INITIAL CONDITIONS IN TIME INTEGRATION METHODS FOR SELF-EXCITED NONLINEAR VIBRATIONS: THE CASE OF RAILWAY CURVE SQUEAL.. In: Proceedings of the 54th International Congress and Exposition on Noise Control Engineering. Anais...Sao Paulo(SP) WTC Events Center, 2025. Available in: https//www.even3.com.br/anais/international-congress-exposition-noise-control-engineering/1074282-IMPACT-OF-THE-INITIAL-CONDITIONS-IN-TIME-INTEGRATION-METHODS-FOR-SELF-EXCITED-NONLINEAR-VIBRATIONS--THE-CASE-OF-. Access in: 10/09/2025