Abstract
The purpose of this paper is to analyze the performance of the hydro-pneumatic suspension system (HPSs) of a mining dump truck on ride comfort under operating conditions. To achieve goals, a 3-D full-vehicle vibration model of a mining dump truck with 10 degrees of freedom is set up to analyze the effects. A nonlinear mathematical model is set up based on the nonlinear characteristics of the HPSs to determine their vertical force which is connected with a 3-D full-vehicle vibration model. The effects of operating conditions on a heavy truck ride comfort are respectively analyzed through the values of the root mean square of acceleration responses of the vertical cab, pitch and roll angles of cab (awc, awphi and awteta). The analysis results indicate that the survey conditions have a great influence on vehicle ride comfort. Especially, the values of awc, awphi and awteta with the poor road surface condition respectively reduce by 43.1%, 45.9% and 61.8% compared to the very poor road surface condition at vehicle speed of 30 km/h and full load.
Highlights
IntroductionHydro-pneumatic suspension system (HPSs) is increasingly used on vehicles, especially heavy trucks that often operate on off-road surfaces
With its outstanding advantages, hydro-pneumatic suspension system (HPSs) is increasingly used on vehicles, especially heavy trucks that often operate on off-road surfaces
A nonlinear mathematical model is set up based on the nonlinear characteristics of the HPSs to determine their vertical forces which is connected with a 3-D full-vehicle vibration model
Summary
Hydro-pneumatic suspension system (HPSs) is increasingly used on vehicles, especially heavy trucks that often operate on off-road surfaces. The performance of the HPSs of heavy truck on the ride quality of road surfaces analyzed and compared with other types of suspension systems using 3-D full-vehicle vibration model [6-7]. The effect of operating conditions on road surface were analyzed and evaluated through the values of the dynamic load factor of the wheel using 3-D full-vehicle vibration model [9]. The effectiveness of two types of heavy truck suspension systems in terms of reducing the dynamic wheel forces acting on road surface was proposed and compared under different operating conditions 3-D full-vehicle vibration model [10]. The objective of this work is to analyze the performance of the HPSs of a mining dump truck on ride comfort under operating conditions. The effects of operating conditions on a heavy truck ride comfort are respectively analyzed through the values of awc, awphi and awteta are chosen as objective functions
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