Eventos Anais de eventos
COBEM 2021
26th International Congress of Mechanical Engineering
Comparative study between front cabin suspension geometries and their vibration absorption capabilities.
Submission Author:
Marcelo Mol , MG
Co-Authors:
Marcelo Mol, Maria Lúcia Duarte
Presenter: Marcelo Mol
doi://10.26678/ABCM.COBEM2021.COB2021-0542
Abstract
Commercial vehicles present certain peculiarities in relation to passenger vehicles, mainly in the development of systems capable of absorbing the vibrations from the places they are inserted. It must be considered that they are vehicles whose use is for long periods of exposure and with variable loads, capable of completely changing the dynamics of the product. The product development scenario always seeks to obtain the best dynamic performance linked to the lowest cost options. Therefore, this study shows a comparative study of vibration absorption between two front cabin cushioned suspension, with different geometries and stiffness: 1- Baseline stiffness 600 N/mm; 2-Proposal stiffness 414 N/mm. The proposed suspensions shows differences not only in the stiffness but also in the geometry of the rubber, presenting a low-cost solution. The analyzes are based on the transmissibility (0Hz-20Hz) between the chassis and the cab, the vibration absorption at the base of the driver's seat (0Hz-20Hz) and steering wheel (0Hz-20Hz) for an input signal made on the rough road track at 50km/h. The following points were instrumented: chassis, cabin, steering wheel and driver seat base. It could be seen that, although not the perfect one as the transmissibility results are still high, the proposed solution managed to reduce both the levels of Hand-Arm Vibration (HAV), as well, as the levels of Whole-Body Vibration (WBV), compared with the solution used in the industry (Baseline).
Keywords
Cabin suspension, Geometries, Hand-arm vibration, Whole Body Vibration
