Effect of the size of speed bump on the vibration and total dynamic load of the 4-axle truck vehicle

Abstract

This article focuses on researching and investigating the influence of speed bump size on wheel vibration and total dynamic load on the road surface. The full oscillation model of a 4-axle truck vehicle is established using the multi-body system method analysis. The rear axle suspension system is described using the motions of a rigid beam. The model is simulated using MATLAB-Simulink software to evaluate the vibration of a 4-axle truck vehicle at 40km/h with varying bump heights and lengths. The results clearly show that increasing bump height or decreasing bump length both increase vibration and total dynamic load on the axles, potentially causing loss of stability and compromising safety. These findings can serve as a basis for designing active control systems to increase comfort and reduce the impact of dynamic loads on the road surface. Additionally, they can inform the selection of appropriate speed bump sizes.