THE EFFECT OF THE DYNAMIC WHEEL LOAD AND MEASURED SOIL BEHAVIOR ON STABILITY OF TRACKED VEHICLES

The randomly input from the surface and consequently the wheels dynamic
loads has a significant influence on the tracked vehicle ride and its stability. However,
the tracked vehicle always travels over a deformable terrain with major obstacles. So
it is important to conjunct between the ride responses and the stability models of the
tracked vehicle moving on the soft soil. In this paper, a vertical dynamic tracked
vehicle six degrees of freedom and the forces at the track-terrain interaction models
were provided. The soil parameters have three types of soil; sand, clay and wet ciay
are measured. These measured parameters are used in the developed mathematical
model to study the effect of the roadwheel dynamic load on the normal force, rolling
resistance force, tractive force and drawbar pull at each of roadwheel. The present
paper introduced new figures of the interaction forces time history between track and
terrain. Also, the effect of different types of soil on the tracked vehicle stability was
presented. The results showed that, the measured soil parameters were helpful for the
model to provide accurate results. The terrain surface parameters have a significant
influence on the tracked vehicle ride parameters. The time history of the interaction
forces between track and terrain surface is helpful to understand the phenomenon of
terramechanics. The clay soil provides higher tractive force and drawbar pull than the
sand soil