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Abstract: Because of the complicated nature of track and train, investigation of interactions between them has been always an complex problem in railway engineering. Perceiving of this interaction is an complex problem only in track with various defects but also in the track without defects. Estimating of the forces exerted on track and train will be much difficult when a defect such as rail corrugation is added to this interaction. If an accurate computer model is available, we can have a good forecast of these forces. However, precise estimating of them is only reached field measurement. In this study, we tried to present a good estimation of passenger and freight wagon forces on track with rail corrugation defect. The pressure between sleeper and ballast was calculated by these forces. Afterwards pressure (on ballast surface)-rail corrugation wavelength diagrams was determined. By using these diagrams, the rail corrugation wavelength where ballast stresses were beyond the permissible limit for each type of operation, was determined (it was named critical corrugation wavelength). A computer model was developed in ADAMS/Rail software for passenger and freight wagons with various speeds to estimate the forces exerted on the ballasted track with corrugation defect.

Keywords: Pressure on ballast surface, Rail corrugation, Track dynamic analysis, Critical corrugation wavelength

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