Towards an engineering model for curve squeal
Paper in proceeding, 2015

Curve squeal is a strong tonal noise that may arise when a railway vehicle negotiates a curve. The wheel/rail contact model is the central part of prediction models, describing the frictional instability occurring in the contact during squeal. A previously developed time-domain squeal model considers the wheel and rail dynamics, and the wheel/rail contact is solved using Kalker’s nonlinear transient CONTACT algorithm with Coulomb friction. In this paper, contact models with different degree of simplification are compared to CONTACT within the previously developed squeal model in order to determine a suitable contact algorithm for an engineering curve squeal model. Kalker’s steady-state FASTSIM is evaluated, and, without further modification, shows unsatisfying results. An alternative transient single-point contact algorithm named SPOINT is formulated with the friction model derived from CONTACT. Comparing with the original model results, the SPOINT implementation results are promising and similar to results from CONTACT.

curve squeal

frictional instability


contact mechanics

single-point contact





Ivan Zenzerovic

Chalmers, Civil and Environmental Engineering, Applied Acoustics

Astrid Pieringer

Chalmers, Civil and Environmental Engineering, Applied Acoustics

Wolfgang Kropp

Chalmers, Civil and Environmental Engineering, Applied Acoustics

Notes on Numerical Fluid Mechanics and Multidisciplinary Design

1612-2909 (ISSN) 1860-0824 (eISSN)

Vol. 126 433-440

Subject Categories

Mechanical Engineering

Vehicle Engineering

Fluid Mechanics and Acoustics

Areas of Advance




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