A study assessing vertical track geometry quality based on simulations of dynamic track—vehicle interaction is presented in this article. The dynamic model is composed of track, vehicle, and wheel—rail contact with moving irregularities and is solved in the frequency domain by fast Fourier transform or in the time domain by constructing a filter function based on system identification. Frequency-dependent stiffness and loss factor of railpads are used in this study. Numerical simulations are carried out for a 120 km long track to demonstrate the potential benefits of enhancing track quality assessment by calculating wheel—rail forces.
Railway applications track track geometry quality part 5: geometric quality levels (draft May 2007).
2.
Railway applications testing for the acceptance of running characteristics of railway vehicles testing of running behaviour and stationary tests, June 2005.
3.
Official journal of the European communities, L245/143, EN, 12 September 2002.
4.
BonaventuraC. S.PaleseJ. W.ZarembskiA. M.‘Real-time prediction of railway vehicle response to the interaction with track geometry’ (2003).
5.
LiD. Q.SalahifarT.MaloneJ.KalayS. F.‘Implementation of performance-based track geometry inspection on North American railroads’ (2005).
6.
SunY. Q.DhanasekarM.RoachD.Effect of track geometry irregularities on wheel–rail impact forces. In Proceedings of the Conference on Railway Engineering, Darwin, 20–23 June 2004, pp. 03.1–03.7.
7.
VermijI.GraafH. J.GinkelW. J.Evaluation of the track geometry using vehicle dependent assessment filters. NedTrain Consulting, 2006 (internal report).
8.
KnotheK.GrassieS. L.‘Modelling of railway track and vehicle/track interaction at high frequencies’Veh. Syst. Dyn.22 (1993): 209–262.
9.
PoppK.KruseH.KaiserI.‘Vehicle–track dynamics in the mid-frequency range’Veh. Syst. Dyn31 (1999): 423–464.
10.
NielsenJ. C. O.LundénR.JohanssonA.VernerssonT.‘Train–track interaction and mechanisms of irregular wear on wheel and rail surfaces’Veh. Syst. Dyn.401–3 (2003): 3–54.
11.
PolachO.BergM.IwnickiS.Iwnicki Ed.S.SimulationHandbook of railway vehicle dynamics (Taylor & Francis Group 2006): 359–421 ch. 12.
NielsenJ. C. O.High-frequency vertical wheel–rail contact forces – validation of a prediction model by field testing. In Proceedings of the 7th International Conference on Contact Mechanics and Wear of Rail/Wheel Systems (CM2006), Brisbane, Australia, 24–27 September 2006, pp. 41–48.
14.
LiM. X. D.EkevidT.WibergN.-E.An integrated vehicle–track-ground model for investigating the wheel/rail dynamic forces due to high axle loads. In Proceedings of the 6th International Conference on Contact Mechanics and Wear of Rail/Wheel Systems (CM2003), Gothenburg, Sweden, 10–13 June 2003, pp. 295–300.
15.
BerggrenE. G.LiM. X. D.SpännarJ.‘A new approach to the analysis and presentation of vertical track geometry quality and rail roughness with focus on train–track interaction and wavelength content. In Proceedings of the 7th International Conference on Contact Mechanics and Wear of Rail/Wheel Systems (CM2006), Brisbane, Australia, 24–27 September 2006.
16.
GrassieS. L.GregoryR. W.HarrisonD.JohnsonK. L.‘The dynamic response of railway track to high frequency vertical excitation’J. Mech. Eng. Sci.242 (1982): 77–90.
17.
Theoretical and user's manual version 3.0 (Delft, The Netherlands: TNO Institute of Applied Physics 1999).
18.
NordborgA.Vertical rail vibrations: noise and structure-borne sound generation (1995) PhD Thesis, Department of Technical Acoustics, KTH, Stockholm, 1995.
19.
HecklM. A.‘Railway noise: can random sleeper spacing help?’Acustica81 (1995): 559–564.
20.
HametJ.-F.‘Railway noise: use of the Timoshenko model in rail vibration studies’Acustica85 (1999): 1–12.
21.
PandrolTests on studded rubber railpads to establish a technique for measurement of high frequency dynamic stiffness of railpads. (2003) Report no. 41369–12003.
22.
Banverket Spårlägeskontroll och Kvalitetsnormer – Central Mätvagn Strix, BVF587.02, 1997).
