Influence of Rail Vehicle Parameters on Lateral and Vertical Accelerations of a Passenger Rail Vehicle
No Thumbnail Available
Date
2014-08
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Addis Ababa University
Abstract
This paper presents parametric analysis study of the influence of rail vehicle
parameters on vertical and lateral car body accelerations. Vehicle parameters such as
bogie wheel base, primary and secondary suspension parameters, car body mass, car
body yaw, pitch and roll mass moment of inertias have been studied by varying from -
25% to +25% of their original values. The analysis was conducted by modeling and
simulating 41 DOF passenger rail vehicle using SIMPACK, multibody dynamics
simulation software. The considered vehicle was a conventional rail vehicle with
typical measured rail irregularities from SMPACK model data base. The parametric
analysis results, in the human ride sensitivity frequency ranges i.e. 0.5-2Hz for lateral
and 5-10Hz for vertical accelerations according to ISO 2631, showed that car body
mass, car body pitch mass moment of inertia, secondary suspension vertical damping,
secondary suspension vertical stiffness, primary suspension vertical damping, primary
suspension vertical stiffness and wheel base were sensitive parameters influencing
vertical car body acceleration. While lateral acceleration of the vehicle was influenced
by car body mass, car body roll & yaw mass moment of inertias, and secondary
suspension lateral stiffness & damping, primary suspension lateral stiffness &
damping and wheelbase. The analysis was validated by comparing with experimental
results. The study will give vital information to designers in optimization of rail
vehicles.
Description
Keywords
Parametric analysis, Vehicle acceleration, Vertical ride, Lateral ride, Ride comfort, Ride behavior