The Federal Railroad Administration is sponsoring a research project at the University of Illinois at Chicago (UIC) to develop state of the art modeling and simulation capabilities for railroad vehicle systems. This involves the development of a general purpose code for the dynamic simulation and performance evaluation of railroad vehicle systems. During development of the beta version, SAMS/Rail (Systematic Analysis of Multibody Systems/Rail), a number of simplified models have been constructed to validate the program. These examples include single wheelset models, truck models, full vehicle models and industry recognized benchmarks. In each of these cases, comparisons have been made to available solutions. These results are described in this paper.

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