Note: [] Corresponding author: Ali Zargartalebi, Mechanical Engineering
Department, Faculty of Engineering, Shahid Chamran University, Ahvaz, PO Box:
135, Iran. Tel.: +98 916 312 6783; E-mail: a.zargartalebi@yahoo.com
Abstract: One of the most significant dynamic aspects of coupled vibration of
transmission system and dependent type suspension systems is axle tramp. The
tramp is defined as undesirable oscillation of rigid live axle around roll
axis. In spite of utilizing powerful engines in some type of sport cars, tramp
occurrence causes loss of longitudinal performance. The aim of this paper is to
derive a mathematical model for predicting and classifying of the tramp. A
parameter study reveals that, some parameters such as engine torque, moving
parts moment of inertia, car and wheels weight and the material used in
suspension system play important role in controlling the tramp. It is shown
that large difference between sprung and unsprung mass moment of inertia around
the roll-axis, low vehicle mass, short rear track and medium damping values
have significant effects on the severity of tramp.
Keywords: Axle tramp, vehicle dynamic, axle vibration, sport car
