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Towards an engineering model for curve squeal

Ivan Zenzerovic (Institutionen för bygg- och miljöteknik, Teknisk akustik, Vibroakustik) ; Astrid Pieringer (Institutionen för bygg- och miljöteknik, Teknisk akustik, Vibroakustik) ; Wolfgang Kropp (Institutionen för bygg- och miljöteknik, Teknisk akustik, Vibroakustik)
Noise and Vibration Mitigation for Rail Transportation Systems. Proceedings of the 11th International Workshop on Railway Noise, 9-13 September 2013, Uddevalla, Sweden (1612-2909). Vol. 126 (2015), p. 433-440.
[Konferensbidrag, refereegranskat]

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.

Nyckelord: curve squeal, contact mechanics, railway, wheel, rail, frictional instability, CONTACT, single-point contact

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Denna post skapades 2013-12-10. Senast ändrad 2015-11-20.
CPL Pubid: 188825


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