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Frequency-dependence of discomfort caused by vibration and mechanical shocks

Frequency-dependence of discomfort caused by vibration and mechanical shocks
Frequency-dependence of discomfort caused by vibration and mechanical shocks

The frequency content of a mechanical shock is not confined to its fundamental frequency, so it was hypothesized that the frequency-dependence of discomfort caused by shocks with defined fundamental frequencies will differ from the frequency-dependence of sinusoidal vibration. Subjects experienced vertical vibration and vertical shocks with fundamental frequencies from 0.5 to 16 Hz and magnitudes from ±0.7 to ±9.5 ms-2. The rate of growth of discomfort with increasing magnitude of motion decreased with increasing frequency of both motions, so the frequency-dependence of discomfort varied with the magnitudes of both motions and no single frequency weighting will be ideal for all magnitudes. At the frequencies of sinusoidal vibration producing greatest discomfort (4 to 16 Hz), shocks produced less discomfort than vibration with same peak acceleration or unweighted vibration dose value. Frequency-weighted vibration dose values provided the best predictions of the discomfort caused by different frequencies and magnitudes of vibration and shock. Practitioner Summary Human responses to vibration and shock vary according to the frequency content of the motion. The ideal frequency weighting depends on the magnitude of the motion. Standardised frequency-weighted vibration dose values estimate discomfort caused by vibration and shock but for motions containing very low frequencies the filtering is not optimum.

Journal Article
1366-5847
1-14
Patelli, Giulia
8c10b2b6-ca34-4342-98a1-3297d3e79b0e
Morioka, Miyuki
8eb26aca-8773-4e45-8737-61c2438d30d9
Griffin, Michael J.
24112494-9774-40cb-91b7-5b4afe3c41b8
Patelli, Giulia
8c10b2b6-ca34-4342-98a1-3297d3e79b0e
Morioka, Miyuki
8eb26aca-8773-4e45-8737-61c2438d30d9
Griffin, Michael J.
24112494-9774-40cb-91b7-5b4afe3c41b8

Patelli, Giulia, Morioka, Miyuki and Griffin, Michael J. (2018) Frequency-dependence of discomfort caused by vibration and mechanical shocks. Ergonomics, 1-14. (doi:10.1080/00140139.2018.1429674).

Record type: Article

Abstract

The frequency content of a mechanical shock is not confined to its fundamental frequency, so it was hypothesized that the frequency-dependence of discomfort caused by shocks with defined fundamental frequencies will differ from the frequency-dependence of sinusoidal vibration. Subjects experienced vertical vibration and vertical shocks with fundamental frequencies from 0.5 to 16 Hz and magnitudes from ±0.7 to ±9.5 ms-2. The rate of growth of discomfort with increasing magnitude of motion decreased with increasing frequency of both motions, so the frequency-dependence of discomfort varied with the magnitudes of both motions and no single frequency weighting will be ideal for all magnitudes. At the frequencies of sinusoidal vibration producing greatest discomfort (4 to 16 Hz), shocks produced less discomfort than vibration with same peak acceleration or unweighted vibration dose value. Frequency-weighted vibration dose values provided the best predictions of the discomfort caused by different frequencies and magnitudes of vibration and shock. Practitioner Summary Human responses to vibration and shock vary according to the frequency content of the motion. The ideal frequency weighting depends on the magnitude of the motion. Standardised frequency-weighted vibration dose values estimate discomfort caused by vibration and shock but for motions containing very low frequencies the filtering is not optimum.

Text
14820 GP-MM-MJG 2018 - Accepted Manuscript
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More information

Accepted/In Press date: 12 January 2018
e-pub ahead of print date: 29 January 2018
Keywords: Journal Article

Identifiers

Local EPrints ID: 418068
URI: http://eprints.soton.ac.uk/id/eprint/418068
ISSN: 1366-5847
PURE UUID: 054a264d-2707-4d55-8634-08a0d479e6d1
ORCID for Michael J. Griffin: ORCID iD orcid.org/0000-0003-0743-9502

Catalogue record

Date deposited: 21 Feb 2018 17:30
Last modified: 17 Dec 2019 05:39

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