A comparison of standardized methods for predicting the hazards of whole-body vibration and repeated shocks.
International Conference on Whole-Body Vibration Injuries. Southampton, GBR, 1997/09/15.
Methods of measuring, evaluating and assessing whole-body vibration and repeated shock are offered in ISO 2631 (1974,1985), BS 6841 (1987), and ISO 2631 (1997).
This paper presents a comparison of guidance on the health effects of vibration and repeated shock given in these standards.
International Standard 2631 (1974,1985) offered a set of exposure limits.
British Standard 6841 (1987) defines a measurement and evaluation procedure (based on frequency weightings and the vibration dose value, VDV), gives an action level that can be used to assess vibration severity, and mentions some appropriate actions (consideration of the fitness of exposed persons, design of safety precautions, regular health checks).
International Standard 2631 (1997) is unclear in several important areas :
which body postures and axes are to be assessed ;
whether evaluations of multi-axis vibration should be based on the « worst axis » or a combination of the frequency-weighted acceleration in all axes ;
why a new frequency weighting,
W, is proposed for vertical vibration when it is almost within the error tolerance of an existing weighting,
why a 1.4 multiplying factor is used to evaluate vibration with respect to health but not with respect to comfort ;
how to choose between different time-dependencies (overall r.m.s., VDV, running r.m.s., and no time-dependency) ;
allowing use of either the maximum value of a running r.m.s. (i.e. (...)
Mots-clés Pascal : Homme, Biomécanique, Vibration, Choc mécanique, Corps entier, Position assise, Santé, Risque accidentel, Norme ISO
Mots-clés Pascal anglais : Human, Biomechanics, Vibration, Mechanical shock, Whole body, Seated position, Health, Hazard, ISO standard
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 98-0501010
Code Inist : 002B08A. Création : 19/02/1999.