Discomfort caused by x-axis vibration of the back: effect of backrest inclination


Basri, B. and Griffin, M.J. (2010) Discomfort caused by x-axis vibration of the back: effect of backrest inclination. In, 45th UK Conference on Human Response to Vibration, Gosport, GB, 06 - 08 Sep 2010.

Download

[img]
Preview
PDF
Download (1501Kb)

Description/Abstract

Vibration of the back is a potential source of discomfort for car passengers, with vibration in the x-axis (i.e. fore-and-aft with an upright backrest) often dominant. This study investigated how vibration discomfort depends on both the frequency of x-axis backrest vibration and the inclination of the backrest. Twelve subjects seated with a rigid backrest inclined by 0, 30, 60, or 90 degrees rated the discomfort caused by x-axis backrest vibration at 11 frequencies (between 2.5 and 25 Hz) at 9 levels (from about 3 to 24 dB above the absolute threshold in 3 dB steps) relative to the discomfort caused by 0.15 ms-2 r.m.s. 8-Hz x-axis backrest vibration. The subjects also rated the discomfort caused by 9 levels of 8-Hz x-axis backrest vibration relative to the discomfort caused by 2.0 ms-2 r.m.s. 8-Hz x-axis (i.e. vertical) vibration of the hand. The vibration acceleration of the backrest required to cause discomfort tended to be least at 8 Hz with the upright backrest and at 10 or 12.5 Hz with the backrest inclined by 30, 60, or 90. At frequencies from 4 to 8 Hz, about 30 to 40% less acceleration was required to cause discomfort with the upright backrest than with the inclined backrests. It is concluded that frequency weighting Wc is appropriate for predicting vibration discomfort caused by x-axis vibration of an upright backrest, but that another frequency weighting (e.g. Wb) would be more appropriate for inclined backrests.

Item Type: Conference or Workshop Item (Paper)
Related URLs:
Subjects: Q Science > QP Physiology
T Technology > TJ Mechanical engineering and machinery
Divisions: Faculty of Engineering and the Environment > Institute of Sound and Vibration Research > Human Sciences Research Group
ePrint ID: 337582
Date Deposited: 30 Apr 2012 15:15
Last Modified: 27 Mar 2014 20:21
URI: http://eprints.soton.ac.uk/id/eprint/337582

Actions (login required)

View Item View Item

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