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PROCEEDINGS OF THE THIRD INTERNATIONAL CONFERENCE ON RAILWAY TECHNOLOGY: RESEARCH, DEVELOPMENT AND MAINTENANCE
Edited by: J. Pombo
Validation of Crashworthiness Design of Railway Vehicles
Z. Malkovský and R. Jezdík
VÚKV a.s., Prague, Czech Republic
, "Validation of Crashworthiness Design of Railway Vehicles", in J. Pombo, (Editor), "Proceedings of the Third International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Stirlingshire, UK, Paper 312, 2016. doi:10.4203/ccp.110.312
Keywords: testing, simulation, vehicle, crashworthiness, force, calibration.
This paper describes the validation of computational models by means of experiments. The basic requirements for the validation are a part of the European standard EN 15227. The level of forces acting during crash tests of railway vehicles is markedly higher in comparison with crash tests of road cars. A criterion for the crashworthiness design assessment is the level of the absorbed energy. This energy is determined based on the time histories of acting forces and deformations of the object tested. Shear and asymmetric forces that may be invoked during dynamic testing of crash elements and of crash front parts have a significant influence on the accuracy of the force measurements by the load cells. For that reason, the level of parasitic shear and asymmetric forces has to be compensated. Special fixtures have been developed to avoid any significant shear and asymmetric force effects on the load cells. Thus, correct test data of the forces have been recorded and allowed a correct validation of the numerical models. The comparison of the validation test and numerical simulation results are demonstrated.
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