The University of Southampton
University of Southampton Institutional Repository

Discomfort caused by multiple frequency fore-and-aft, lateral or vertical whole-body vibration

Discomfort caused by multiple frequency fore-and-aft, lateral or vertical whole-body vibration
Discomfort caused by multiple frequency fore-and-aft, lateral or vertical whole-body vibration
The practical application of currently standardised methods of evaluating wholebody vibration assumes the discomfort caused by a combination of frequency components can be predicted using time averaging methods, such as the rootmean-square, r.m.s., or vibration dose value, VDV. This study investigated whether the discomfort produced by random vibration depends on the frequency of the vibration (three bands of octave-bandwidth random vibration with frequencies in the range 1.4 to 11.3 Hz) or the direction of vibration (fore-and-aft, lateral, or vertical). The study was conducted with frequency-weighted vibration magnitudes in the range 0.40 to 0.78 ms-2 r.m.s. Eighteen subjects provided magnitude estimates of their discomfort when exposed to single and multiple bands of the octave-bandwidth random whole-body vibration. With each of the three directions of vibration, the linear sum of the magnitude estimates of the discomfort overestimated the discomfort caused by the combination of 2 or 3 bands, whereas the magnitude estimate of discomfort caused by the worst band underestimated the discomfort caused by the combination of 2 or 3 bands. Over all the vibration stimuli investigated, the optimum power for summating magnitude estimates to predict vibration discomfort was 2.54, with no statistically significant differences between frequencies or directions of vibration. It is explained that the optimum power for summating vibration magnitudes differs from the optimum power for summing magnitude estimates of vibration discomfort, because vibration discomfort is not usually linearly related to the magnitude of vibration and the rate of growth of vibration discomfort varies with the frequency and the direction of vibration.
Arnold, James J.
c48dc46f-5243-4ca2-a7e2-6b8b1c3b861a
Griffin, Michael J.
24112494-9774-40cb-91b7-5b4afe3c41b8
Arnold, James J.
c48dc46f-5243-4ca2-a7e2-6b8b1c3b861a
Griffin, Michael J.
24112494-9774-40cb-91b7-5b4afe3c41b8

Arnold, James J. and Griffin, Michael J. (2017) Discomfort caused by multiple frequency fore-and-aft, lateral or vertical whole-body vibration. 52nd UK Conference on Human Response to Vibration, Faringdon, United Kingdom. 05 - 06 Sep 2017. 11 pp .

Record type: Conference or Workshop Item (Paper)

Abstract

The practical application of currently standardised methods of evaluating wholebody vibration assumes the discomfort caused by a combination of frequency components can be predicted using time averaging methods, such as the rootmean-square, r.m.s., or vibration dose value, VDV. This study investigated whether the discomfort produced by random vibration depends on the frequency of the vibration (three bands of octave-bandwidth random vibration with frequencies in the range 1.4 to 11.3 Hz) or the direction of vibration (fore-and-aft, lateral, or vertical). The study was conducted with frequency-weighted vibration magnitudes in the range 0.40 to 0.78 ms-2 r.m.s. Eighteen subjects provided magnitude estimates of their discomfort when exposed to single and multiple bands of the octave-bandwidth random whole-body vibration. With each of the three directions of vibration, the linear sum of the magnitude estimates of the discomfort overestimated the discomfort caused by the combination of 2 or 3 bands, whereas the magnitude estimate of discomfort caused by the worst band underestimated the discomfort caused by the combination of 2 or 3 bands. Over all the vibration stimuli investigated, the optimum power for summating magnitude estimates to predict vibration discomfort was 2.54, with no statistically significant differences between frequencies or directions of vibration. It is explained that the optimum power for summating vibration magnitudes differs from the optimum power for summing magnitude estimates of vibration discomfort, because vibration discomfort is not usually linearly related to the magnitude of vibration and the rate of growth of vibration discomfort varies with the frequency and the direction of vibration.

Text
2017_08_18 Equivalent_discomfort_for_combined_frequency_single_axis_vibration SUBMITTED MJG - Accepted Manuscript
Download (298kB)

More information

Published date: 5 September 2017
Venue - Dates: 52nd UK Conference on Human Response to Vibration, Faringdon, United Kingdom, 2017-09-05 - 2017-09-06

Identifiers

Local EPrints ID: 422789
URI: https://eprints.soton.ac.uk/id/eprint/422789
PURE UUID: edf9c96c-2f01-40aa-b96d-57a538d04e41
ORCID for James J. Arnold: ORCID iD orcid.org/0000-0003-1987-515X
ORCID for Michael J. Griffin: ORCID iD orcid.org/0000-0003-0743-9502

Catalogue record

Date deposited: 06 Aug 2018 16:30
Last modified: 14 Mar 2019 01:56

Export record

Contributors

Author: James J. Arnold ORCID iD

University divisions

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of https://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×