EXPLORATORY STUDY OF WHOLE-BODY VIBRATION 'ARTEFACTS' EXPERIENCED IN A WHEEL LOADER, MINI-EXCAVATOR, CAR AND OFFICE WORKER'S CHAIR

Many factors need to be considered when conducting whole-body vibration (WBV) risk assessments. Complications may arise with the evaluation of the vibration profile when high acceleration events are present. These peaks could be the result of a genuine exposure to high impact events, such as driving over a pothole or when experiencing an end-stop impact. However, the event could also be the result of an alternative factor, such as the driver altering their posture on the seat and during ingress/egress: an ‘artefact’. This paper presents a study conducted to characterise the events of ingress/egress of operators. Using a range of subjects with different weights and heights, repeat measurements were made in a Mini Excavator (mechanical suspension seat), Wheel Loader (air suspension seat), Volvo car (conventional seat) and office worker’s chair.