Driveability prediction in design process of freight wagon underframe

Validation of designed components by means of simulation tools is nowadays an integral part of the development process of rolling stock and greatly reduce the time necessary for design, tests and certification of new vehicles or equipment. In the future, it will be possible in the case of verification results replace some real tests by simulation analysis on certain conditions. Based on the obtained results, it is then possible to design the wagon structure quite accurately so, that all evaluation criteria of the real tests are met. They also provide valuable information for the construction of other wagons similar transport purpose. The aim of the authors is to analyze ride properties of new wagon chassis for freight transport by using simulation analysis of a vehicle ride and subsequent processing of the results in VI- Rail software. The article deals with the dynamic analysis of freight wagon with multifunctional loading plane for safe rides along an S-shaped curve, where in the first step we focused on examining the wagon’s resistance to longitudinal compressive forces, because currently are subject to high demands on low weight to the wagons of this category and hence on relatively low torsional stiffness. The second part investigates enough overlap of buffers, where during the simulation we followed the lateral displacement of all buffers.