The paper deals with the dynamics of a periodic structure by means of which such a mechanical system as a railway track can be modelled. The structure considered consists of an infinite Bernoulli-Euler beam resting on periodically spaced spring-damper-mass elements. At first, the case of free wave propagation in a pure elastic structure is considered. Then the steady-state system dynamic response to a moving harmonic force is studied. In both cases a procerure is used which bases on Floquet's theorem. The analysis of dispersion relations makes it possible to determine passing and stopping bands and the eigenforms corresponding to cut-off frequencies. A simple way of calculating critical velocities and frequencies of the load is proposed ana a physical explanation for the increase of wave amplitudes is given.
On Continuous Subsystem Modelling in the Dynamic Interaction Problem of a Train-Track-System
Vehicle System Dynamics ; 24 , sup1 ; 311-324
01.01.1995
Aufsatz (Zeitschrift)
Elektronische Ressource
Unbekannt
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