ABGESAGT: Verification of a Transient Model for the Simulation of Curve Squeal on the basis of On-Board Noise Monitoring Data from Stockholm Metro (en)

* Presenting author
Day / Time: 08.03.2023, 14:00-14:20
Room: Saal Y6
Typ: Regulärer Vortrag

Curve squeal is an intense tonal noise emitted by railway vehicles negotiating tight curves. It is attributed to self-excited vibrations of the railway wheel during 'imperfect' curving. Modelling curve squeal poses a challenge since the phenomenon is non-linear and transient. In this work, a previously developed model for the simulation of curve squeal during transient curving is verified based on on-board noise monitoring data from Stockholm metro.The time-domain squeal model combines pre-calculated impulse response functions for track and wheel dynamics with Kalker’s variational method for transient rolling contact. The model includes the coupling between vertical and tangential dynamics and considers varying contact positions on wheel and rail along the curve. The low-frequency curving behaviour is included by a pre-calculation with a software for simulation of three-dimensional dynamic vehicle-track interaction. In previous work, a statistical analysis was carried out based on data collected with an on-board noise monitoring system during approximately 1.5 years of regular operation by two vehicles on Stockholm metro. Results showed, amongst others, that curve squeal occurrence increases with decreasing curve radius, and after rail grinding. Simulations are carried out with the curve squeal model to replicate and analyze observations from the noise monitoring on Stockholm metro.



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