Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
A PROCEDURE BASED ON MULTIBODY DYNAMICS AND GENETIC ALGORITHM TO STUDY THE INFLUENCE OF THE HYDROPNEUMATIC SUSPENSION ON THE CABIN VIBRATION OF HAUL TRUCKS
Submission Author:
Rodrigo Oliveira , MG
Co-Authors:
Rodrigo Oliveira, Marco Túlio Faria
Presenter: Rodrigo Oliveira
doi://10.26678/ABCM.COBEM2023.COB2023-0421
Abstract
Many haul trucks subsystems are usually subjected to high levels of vibration during high-production mining. The vibration produced during the truck operation can compromise the drive ride comfort and health. The role played by the hydropneumatic suspensions is vital to reduce the level of transmitted vibration. In order to enlarge the knowledge about the influence of the suspension parameters on the truck dynamic behavior, firstly a ten degrees of freedom multibody dynamic model is developed. The source of vibration is based on standardized random functions associated with the road pavement quality. Some suspension experimental data are compared to the model results to check the model accuracy to reproduce actual conditions. Secondly, a multiobjective optimization procedure based on genetic algorithm is also implemented to generate some optimized suspension parameters that permit to reduce the cabin vibration, the chassis roll and the pitch angle. The results obtained indicate the significant influence of suspension parameters on both truck ride comfort and chassis movement behavior. For the truck CAT 775 considered in this study, the results rendered by the current parameters are close to the optimal point when evaluating the cabin acceleration separately. Nevertheless, with some adjustments and design parameter modifications, it would be possible to further enhance the dynamic behavior of chassis movement and even reduce slightly the cabin acceleration. However, even considering the optimal parameters, the analysis shows that the cabin vibration levels will be above the allowable limits for the truck using passive suspension running on roads with poor-quality profile.
Keywords
Haul Trucks, Vehicle Ride Dynamics, multibody dynamics, multiobjective optimization, genetic algorithm
