An effective time domain method for simulatiing the vertical vehicle-track interactions for low and high frequencies is presented. To be able to investigate the effects of local defects of the track (eg voided sleepers) on contact forces and loads and long-term detoriationn of track components, a discrete track model based on finite elements is necessary. The track model developed is extremely accurate and is able to consider irregularities and nonlineartities of the track structure. The number of sleepers to be considered is chosen so that the infinite extension of the track can be dealt with approximately. For excitation due to short wavelengths like short pitch corrugation or wheel flats, nonlinear contact mechanics had to be considered. The time-step integration algorithm is based on a modal decomposition of linear substructures and is therefore absolutely stable. The method includes the effects of moving masses and is valid for train speeds up to 500 m/s. The capacity of the algorithm is demonstrated for different theoretical and practical examples.
Simulation of high frequency vehicle-track interactions
Eine Simulation der Fahrzeug/Schiene-Wechselwirkung bei hohen Frequenzen
Herbertov Workshop on Interaction of Railway Vehicles with the Track and its Substructure, 3 ; 72-85
Vehicle System Dynamics ; 24 , Supplement
1995
14 Seiten, 10 Bilder, 2 Tabellen, 15 Quellen
Conference paper
English
Simulation of High Frequency Vehicle-Track Interactions
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