Combined Multi-Body-System and Finite Element Analysis of a Rail Locomotive Crashworthiness
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Abstract
The modelling and simulation of a passenger rail vehicle locomotive for its crashworthiness are carried out in this paper. It is carried out as an application of combined FEM and MBS analysis using MADYMO. In some parts, the locomotive is modelled as super elements, principal parts are modelled as finite elements and joints are taken as flexible elements considering all external forces along with boundary conditions. The crashworthiness has been determined by striking the locomotive on to a fixed barrier. The simulation results of MFBD model at 25 kmph is benchmarked to the EN 15227 for validation of this technique. Once the model is validated, it is used for the locomotive crash analysis of crashworthiness behaviour at a different impact speed of 100 kmph, 160 kmph, and 225 kmph. Local buckling is observed at multiple points that restrict locomotive continuous damage characteristics. The results predict an increase in the speed of impact, more plastic deformation for the locomotive frontal part. The peak deformation is nearly 8.23 m observed at 224 kmph velocity.
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