Two simple vehicles and four matching track cases have been defined to allow comparison of the capabilities of the various computer simulation packages currently being used to model the dynamic ...behavior of railway vehicles. Simulations have been carried out with 5 of the major packages in current use and the results are presented here. For each package there is also a statement of the methods used and the main approximations made.
Roller rigs have been built world-wide to research into the dynamics of railway vehicles and they have particularly been applied to the development of high-speed trains. This survey takes into ...consideration both full scale as well as small scale model roller rigs. Besides performance, most important experimental work and the emphasis of application, the scaling strategies of model test rigs and the differences involved in roller rig experiments are treated. Suggestions for potential future uses and developments are also given for this tool which is useful for demonstration and analysis of railway vehicle dynamic behaviour.
Two simple vehicles and four matching track cases are presented to allow comparison of the capabilities of the various computer simulation packages currently being used to model the dynamic behaviour ...of railway vehicles. The benchmarks presented here were agreed at the International Workshop on COMPUTER SIMULATION OF RAIL VEHICLE DYNAMICS at Manchester Metropolitan University on June 23rd and 24th 1997.
A project is being carried out at Manchester Metropolitan University to examine the effects of different vehicles on track deterioration and consequent maintenance costs. A number of track settlement ...models have been investigated including those published by Prof. Sato in Japan and a model based on laboratory experiments at the Technical University of Munich.
The MEDYNA simulation package has been used to generate the equations of motion for the vehicles being studied and time stepping integration routines used to predict motions and forces as required. The ADAMS/Rail package has also been used to assist with the visualisation of the models and the predicted behaviour. Inputs to the model were made at each wheelset. These were either idealised discrete events such as dipped rail joints or measured values from real sections of track.
The results are presented here for three vehicles with different types of suspension and for two of the track settlement models. All of the settlement models used predict that the suspension characteristics have a large effect on the rate of track deterioration. The general trends in predicted track settlement rate agree between the two settlement models but there are also some very significant variations in the relative rates for some cases.
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