SURVEYING THE EFFECT OF TORSIONAL STIFFNESS OF THE ANTI-ROLL BAR ON ROLL STABILITY OF TRUCKS

Abstract

To improve roll stability, most modern vehicles are equipped with passive anti-roll bars at the axles. In this study, the authors establish a general oscillation
model of a truck in space combined with a single-track motion model to study roll stability. The basic anti-roll bar model is designed to be linked with the proposed
truck model as the foundation for selecting the torsional stiffness range of the anti-roll bar at the front and rear axles for the truck. Through Matlab/Simulink software,
the truck's roll stability characteristics are visually evaluated through the vertical dynamic force at each wheel acting on the road surface, the lateral acceleration at
the truck's center of gravity, and the normalized load transfer coefficients at two axles. The simulation results show that the optimal torsional stiffness of the anti-roll
bar for selected trucks ranges from 28,000Nm/rad to 45,000Nm/rad. The results of this research are the fundamental for further research to focus on optimizing
torsional stiffness and physical parameters of the anti-roll bar to suit all types of different operating conditions of trucks.