For a dicone moving on a pair of cylindrical rails the equations of motion are established. The frictions forces due to Kalker's theory of rolling contact are approximated by nonlinear functions. For this nonlinear system conditions for the dynamical similarity of a scaled and a full scale model are derived. The equations of motion are extended to a railway bogie model with two conical wheelsets. Numerical simulation results for the dicone as well as for the bogie model are obtained with a particular software taking into account the specific structure of the equations of motion. The simulation results are compared with experiments on a 1:5 scaled roller rig where the bogie model was designed with the aid of scaling factors for length, mass, inertia and suspension stiffness due to dynamical similarity laws. The results indicate that the nonlinear behavior of designs of railway running gears or even complete vehicles can be investigated in a wide range on a scaled test rig.
Application of Similarity Laws to a Scaled Railway Bogie Model
1990
166 pages
Report
Keine Angabe
Englisch
Railroad Transportation , Tribology , Coefficient of friction , Dynamic models , Equations of motion , Motion simulation , Rail transportation , Rolling contact loads , Scaling laws , Similarity numbers , Dynamic characteristics , Mathematical models , Nonlinear systems , Rollers , Scale effect , Foreign technology , Theses
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