An engineering time-domain model for curve squeal: Tangential point-contact model and Green's functions approach
Artikel i vetenskaplig tidskrift, 2016

Curve squeal is a strong tonal sound that may arise when a railway vehicle negotiates a tight curve. In contrast to frequency-domain models, time-domain models are able to capture the nonlinear and transient nature of curve squeal. However, these models are computationally expensive due to requirements for fine spatial and time discretization. In this paper, a computationally efficient engineering model for curve squeal in the time domain is proposed. It is based on a steady-state point-contact model for the tangential wheel/rail contact and a Green's functions approach for wheel and rail dynamics. The squeal model also includes a simple model of sound radiation from the railway wheel from the literature. A validation of the tangential point-contact model against Kalker's transient variational contact model reveals that the point-contact model performs well within the squeal model up to at least 5 kHz. The proposed squeal model is applied to investigate the influence of lateral creepage, friction and wheel/rail contact position on squeal occurrence and amplitude. The study indicates a significant influence of the wheel/rail contact position on squeal frequencies and amplitudes. Friction and lateral creepage show an influence on squeal occurrence and amplitudes, but this is only secondary to the influence of the contact position.

Sound radiation

Contact model

Time domain

Wheel/rail interaction

Curve squeal

Tangential point-contact


Ivan Zenzerovic

Chalmers, Bygg- och miljöteknik, Teknisk akustik

Wolfgang Kropp

Chalmers, Bygg- och miljöteknik, Teknisk akustik

Astrid Pieringer

Chalmers, Bygg- och miljöteknik, Teknisk akustik

Journal of Sound and Vibration

0022-460X (ISSN) 1095-8568 (eISSN)

Vol. 376 149-165


Strömningsmekanik och akustik