Ride and roll stability analysis of off-road vehicles with torsio-elastic suspension

A three-dimensional ride dynamic off-road vehicle model with torsio-elastic suspension was formulated to investigate the potential of ride comfort improvement as well as roll stability preservation for different suspension arrangements. The model validation was based on the field measurements of a rear-suspended vehicle with torsio-elastic suspension. According to the vibration response analysis near the operator seat and the roll angle of vehicle chassis, the results show that the torsio-elastic suspension could improve the ride performance as well as increase the roll stability of the vehicle. The results also illustrate that the fully-suspended vehicle could obviously decrease the vibration at the driver seat along all axes, and front-suspended vehicel could provide a batter ride performance, compared the rear-suspended vehicle. The loading effect was also analysed for vehicles with different suspension options, which illustrates that the torsio-elastic suspension is less sensitive to variations in the load. © 2019, Editorial Office of Journal of Vibration and Shock. All right reserved.