Analyzing the effect of vehicle speed and class of random road profile on a 4-axle truck vehicle vibration

Abstract

The vehicle will generate vibration due to the impact of road surface, wind, steering, accelerating, braking...as it moves on road surfaces. These vibrations directly affect people and goods. A 14 DOF full vehicle dynamic model of the 4-axle truck vehicle with the torsion of the chassis and the “Walking Beam” tandem suspension is developed to analyze the effect of vehicle speed and a class of random road profile conditions on the vibration of the 4-axle truck vehicle which is developed based on Newton Euler equations and solved via Matlab/Simulink software. The study results have shown that the road surface and vehicle speed conditions have a great effect on vehicle vibrations. In addition, the results of this study could provide useful analysis results for proposing solutions to optimize the structure of the suspension system to improve the ride comfort of the vehicle and reduce the dynamic load of multi-axle truck vehicles.