Dynamic Analysis with Multi-Body Simulation Of Articulated Passenger Car Of AALRT

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Addis Ababa University


The railway vehicle running along a track is one of the most complex dynamic systems in railway engineering and it has many degree of freedom, the interaction `between wheel and rail, suspension and articulation systems involves complex systems. However, thevehicle body lowering down to the rail at maximum load condition was critical issue for the corporation. To identify the stated problem, dynamic analysis with multi-body simulation of articulated passenger car is crucial by SIMACK MBS software package. The 3D modeling and the simulation process pass through three steps by using this multi-body simulation software package. The Simulation results were the predictions of vertical deformation of railway vehicle suspension and articulations on straight and curved track can be made. The primary suspension, secondary suspension and articulation systems vertical deformation were 5.25mm, 15.125mm, and 12.35mm in straight track and 17.125mm, 40mm and 22.125mm in curved track. In order to withstand the vehicle body lowering down problem, vertical primary and secondary suspension stiffness and damping value optimized. After optimization the primary and secondary suspension and articulation system vertical deformations were 15.975, 20.325 and 16.375mm. Therefore, the vertical suspension and articulation systems, maximum vehicle load, minimum track curve radius and wheel diameter variation have great effect for the current problem. To withstand this problem, the vertical suspension stiffness and damping value have to be optimized.



dynamic analysis, multi-body simulation, simpack, articulation, suspension, 3D model, simulation