Study On Vertical Dynamic Vehicle-track
Interactions Using The TRADYS Test Facility
And Computer Simulation
Author(s)
M. Miwa & A. Yoshimura
Abstract
It is important when studying vehicle-track dynamic interactions to make clear
the characteristics of many physical and/or structural parameters of a track.
However, it is difficult to estimate them with accuracy only through
measurements under a real train load on site. In this paper, we describe an
approach using two tools of a test facility and computer simulation. The Track
and Structural Dynamics Simulator (TRADYS) is a unique mechanical vibration
exciter equipped with hydraulic actuators between a train and a track. The train
has the same masses and suspensions as the latest Japanese high speed railway
vehicle. We can control arbitrarily the vertical relative displacements between
rails and wheels through the directions inputted to the actuator. These relative
displacements are supposed to represent a railway track irregularity. In the
experiments, dynamic wheel loads, displacements and accelerations of each part
of a track are measured as the outputs. In addition to the experiments, computer
simulation is carried out. A theoretical model for this special test facility
including the actuator is constructed. In this paper the measured physical values
and computed solutions are compared, and the accuracy of the parameter values
of the track structure components is discussed.
Keywords: vehicle-track interaction, dynamic model, test facility, computer
simulation, parameter estimation.
Keywords
vehicle-track interaction, dynamic model, test facility, computer
simulation, parameter estimation.
Related Book
Other papers in this volume
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