Scholarly record
EVALUATION OF HUMAN EXPOSURE TO WHOLE-BODY VIBRATION - VERIFICATION METHOD OF STEVENS'S POWER LAW
Abstract
The purpose of this paper is to evaluate human exposure to whole-body vibration on a ship and to find a relationship between the value of the vibration parameters transmitted by a ship sailing on the Danube to the sailors and the magnitude of their perception. Experimental: A) Whole body vibrations transmitted to sailors working on a ship sailing on the Danube were measured. The experiments were made in the summer and the Danube had small waves. There were 3 subjects that were placed successively for 30 minutes in the engine room, main deck and upper deck. The accelerations on the 3 axes were measured and then, for each subject, the following averages were calculated: acceleration r.m.s., partial exposure A (8), total exposure A (8). B) Using the Likert scale the discomfort of each subject was assessed in the 3 areas where the determinations were made. Results and conclusions: A) The results have shown that in all cases the measured and calculated values far exceed the values indicated by the Directive 2002/44/EC and ISO 2631, especially in the engine room (where the following averages were found: acceleration Oz axis az=2.837 m/s2; acceleration r.m.s. Aw=4.794 m/s2; partial exposure A(8)=1.198 m/s2. B) For all subjects, the discomfort (D) increases with the acceleration r.m.s. (A), according to Stevens? Power Law. For example, subject 2 (with the highest Body Mass Index) has k = 4.9, unlike the others who have k= 4.4. In the engine room, where the vibrations are very high, b= 0.023 while the main deck and the upper deck . These results confirm that k is a constant that depends on the subject intrinsic parameters and ? is the exponent dependent on the vibration parameters. ? = 0 .019. ? = 0.0163. These results confirm that k is a constant that depends on the subject intrinsic parameters and ? is the exponent dependent on the vibration parameters.
Publication Impact Profile
Publication details
References10
. Ernsthausen, W., Measurement of sound and vibration with reference to physical and physiological problems in aviation, German Aviation Medicine, World War II, Bd. II, S. 686., 1950.
. Loeckle, W.E., The physiological effects of mechanical vibration, in: German Aviation in World War Two, Vol. 2, pp. 716-722, Washington, DC: United States Government Printing Office, 1950.
. Griffin, M. J., Handbook of Human Vibration, Academic Press, London, 2012.
. ISO 2631, Part 1-5, Mechanical vibration and shock - Evaluation of human exposure to whole-body vibration.
. Directive 2002/44/EC of the European Parliament and of the Council of 25 June 2002 on the minimum health and safety requirements regarding the exposure of workers to the risks arising from physical agents (vibration).
. Griffin, M. J., Minimum health and safety requirements for workers exposed to hand-transmitted vibration and whole-body vibration in the European Union; a review, Occup Environ Med, 61:387 397, 2004.
. Ivan, A.; Gasparotti, C.; Rusu, E., 2012, Influence of the interactions between waves and currents on the navigation at the entrance of the Danube Delta, Journal of Environmental Protection and Ecology Volume: 13 Issue: 3A Pages: 1673-1682
. Picu, L., Rusu, E.V.C., Whole body vibrations of a pushtow boat crew on the Danube, Mechanical Testing and Diagnosis, Volume 1, pp. 28-35, 2017 (VII).
. Stevens, S.S., On the psychophysical law, Psychological Review 64(3):153 181, 1957.
. Howarth, H.V.C. and Griffin, M.J., The frequency dependence of subjective reaction to vertical and horizontal whole-body vibration at low magnitudes. Journal of the Acoustical Society of America, 83(4), pp. 1406-1413, 1988.
Citing literature
Number of times cited according to Crossref: 1
View or Download full articleAccess options
SWS access login
Login as SWS Scientific CommitteeLogin as SWS Scientific PartnerLogin as SWS AuthorAuthors and approved SWS contributors will read and export their own linked papers after identity matching by SWS profile, email and SGEM GlobalID.
For librarian assistance: [email protected]
Purchase Instant Access
- Article can be downloaded after successful payment.
- Article may be used according to SWS library access terms.
- Article cannot be redistributed.
