By Klaus Knothe, Karl Popp (auth.), Professor Dr.-Ing Karl Popp, Professor Dr.-Ing Werner Schiehlen (eds.)
During the final a long time thoroughly new applied sciences for top pace railway automobiles were built. the first pursuits were to extend traction, axle load, and traveling pace, and to assure security of the passengers. although, the recent advancements have published new barriers: cost and destruction of the ballast and the subgrade bring about deterioration of the song; abnormal put on of the wheels reason a rise in total load and deterioration of passengers convenience; harm of the working surfaces of the rail and the wheel turns into extra common. This difficulties were investigated within the precedence Programme SPP 1015 supported by way of the Deutsche Forschungsgemeinschaft (DFG), aiming at a greater knowing of the dynamic interplay of car and song and the long term behaviour of the elements of the method. The e-book includes the medical result of the programme as provided on the concluding colloquium held at collage of Stuttgart, Germany, March 13-15, 2002.
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Extra info for System Dynamics and Long-Term Behaviour of Railway Vehicles, Track and Subgrade
1 Iron Ore Export Line In April 1976, self-steering bogies at 26ton axleload started to operate between Sishen and Saldanha  in trains of up to 202 wagons. The minimum curve radius on the 86lkm long line is lOOOm. After approximately six months of operation it was observed that the wheel wear rate was higher than for the 20ton-axleload bogies. As the wheels were overheating during braking it was initially assumed that the additional tread wear was mainly due to braking. However, a closer investigation showed that the offset of the wheels on the axle was outside the laid down tolerance and the actual rail head profile was different from what was given to the bogie designers.
Leichtbau der Verkehrsfahrzeuge, 23 Jahrgang, Heft 6, November/December 1979 10. Scheffel H. (1981) The dynamic stability of two railway wheelsets coupled to each other in the lateral plane by elastic and viscous constraints. 7th IAVSD Symposium, Cambridge University, Cambridge, UK, 7-11 September 1981 11. Scheffel H. (1983) The reduction in mechanical wheel rail wear and energy consumption as well as total cost benefits when using the Scheffel self-steering truck. International Centre for Transportation Studies (ICTS) Conference, Amafid, Italy, June 1983 12.
I 11 / I Fig. 9. Arrangement of projects with similar subjects (part I) • three projects dealing with t he simulation of out-of-round wheels and • four projects dealing with the long-term behaviour of ballast and subgrade, on t he basis of experiments as well as simulations. Some comments on these projects: • Due to t he activities in the DFG Priority Programme, linear and nonlinear simulation of vehicle/ t rack interaction in the medium frequency range is well understood. • The same is true for the simulation of ballast and subgrade as an infinite, continuous or layered half-space with or without inclusions.