Investigating an Interaction between Rail Vehicle Dynamics and Track Alignment of Addis Ababa Light Rail Train
No Thumbnail Available
Date
2017-07
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Addis Ababa University
Abstract
This thesis examines the effect of vehicle dynamics on both vertical and lateral deterioration of
the track alignment. The track system, the measurements of the track geometry and the definition
of the track quality are explained in detail. The background study forms fundamental knowledge
for the vehicle-track lateral dynamic interaction study. A review of current researches in the
field of vertical and lateral railway track deterioration is presented in order to establish a better
understanding of track deterioration mechanisms, highlighting the weakness and limitations of
these studies.
Based on the background and the reviews done in the field, the statistical analysis is done and
provides a better understanding of three aspects of track lateral irregularities: the relationship
between vertical and lateral irregularities, the relationship between track curvature and track
lateral irregularity and the change in track lateral deterioration over time.
The paper describes statistical studies of track deterioration, as well as the development and
validation of a vehicle-track dynamic interaction model so that making the effective control and
reduction of the lateral deterioration achievable and the vertical and lateral track irregularity
magnitudes are clearly correlated. The model indicates the mechanisms influencing track
deterioration both vertically and laterally which provides effective solutions in consideration of
vehicles, wheel-rail contact and the track system.
Description
Keywords
Rail Vehicle, Dynamics, Lateral Misalignment, Interaction, Irregularity, power spectral density, vehicle loading