Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Evaluation of the floor-seat transmissibility (SEAT) in riding vehicles and verification of vibration levels regarding health and comfort in WBV
Submission Author:
Jonatas Stefanello Fagundes , RS
Co-Authors:
Jonatas Stefanello Fagundes, Herbert Gomes
Presenter: Jonatas Stefanello Fagundes
doi://10.26678/ABCM.COBEM2017.COB17-0166
Abstract
Abstract: The whole-body vibration in passengers is one of the important factors in assessing the comfort of a vehicle. Depending on the magnitude of the vibration, this can generate discomfort and health risk factors. In this work, two seat-pads were used to measure the vibration in three axes on the floor and in the seat of an economy vehicle in normal use situation. The filed campaign comprises a route that is composed of two types of track, one made of smooth asphalt, typical of the big cities, and another one composed of cobbled stones, that is usually found in countryside and smaller cities in Brazil. An algorithm in Matlab was developed and implemented for field measurements as well as routines for data post-processing and vibration evaluation for comfort and health according to ISO 2631-1 (1997) and NR-15. For the performed measurements, floor-seat transmissibility is calculated for the three axes in order to evaluate the effectiveness of the seat. It was found that at 4.08 Hz frequency, the transmissibility for the vertical axis of the seat showed a resonance with a gain factor of 3.48, and that this value of transmissibility is greatly reduced at higher frequencies. These results show good agreement with similar studies available in the literature. It was also possible to evaluate that for the measured portion, vibration limits for exposure times of 8 hours are reached in the floor, but not in the seat of the vehicle. Keywords: Transmissibility; WBV; Comfort; Vibration in vehicles; Health.
Keywords
Transmissibility, WBV, Comfort, Vibration in vehicles, Health
