The University of Southampton
University of Southampton Institutional Repository

Effects of seating on the discomfort caused by mechanical shocks: measurement and prediction of SEAT values

Effects of seating on the discomfort caused by mechanical shocks: measurement and prediction of SEAT values
Effects of seating on the discomfort caused by mechanical shocks: measurement and prediction of SEAT values

Seat effective amplitude transmissibilities (SEAT values) quantify the influence of seats on discomfort caused by vibration. This study investigated SEAT values with vertical mechanical shocks at low, medium, and high magnitudes (0.5, 1.0, and 2.0 ms−1.75) at frequencies between 1.0 and 16 Hz. With 18 subjects sitting on a rigid seat and two foam cushions, SEAT values were measured objectively (from the transmitted vibration), measured subjectively (by the responses of subjects), and predicted (using a model of the seat-passenger system). Except with high magnitude low frequency shocks, predicted SEAT values were similar to measured SEAT values. With shocks causing subjects to rise off a cushion and subsequently impact the cushion (low frequencies around 1 g), subjective SEAT values were better estimated using predicted SEAT values than objectively measured SEAT values, because accelerometers on cushions exaggerated the impact of the falling subject. However, accelerometers on rigid seats will underestimate such impacts.

Biodynamic modelling, Mechanical shocks, Seat vibration
0003-6870
134-144
Patelli, Giulia
8c10b2b6-ca34-4342-98a1-3297d3e79b0e
Griffin, Michael J.
24112494-9774-40cb-91b7-5b4afe3c41b8
Patelli, Giulia
8c10b2b6-ca34-4342-98a1-3297d3e79b0e
Griffin, Michael J.
24112494-9774-40cb-91b7-5b4afe3c41b8

Patelli, Giulia and Griffin, Michael J. (2019) Effects of seating on the discomfort caused by mechanical shocks: measurement and prediction of SEAT values. Applied Ergonomics, 74, 134-144. (doi:10.1016/j.apergo.2018.08.003).

Record type: Article

Abstract

Seat effective amplitude transmissibilities (SEAT values) quantify the influence of seats on discomfort caused by vibration. This study investigated SEAT values with vertical mechanical shocks at low, medium, and high magnitudes (0.5, 1.0, and 2.0 ms−1.75) at frequencies between 1.0 and 16 Hz. With 18 subjects sitting on a rigid seat and two foam cushions, SEAT values were measured objectively (from the transmitted vibration), measured subjectively (by the responses of subjects), and predicted (using a model of the seat-passenger system). Except with high magnitude low frequency shocks, predicted SEAT values were similar to measured SEAT values. With shocks causing subjects to rise off a cushion and subsequently impact the cushion (low frequencies around 1 g), subjective SEAT values were better estimated using predicted SEAT values than objectively measured SEAT values, because accelerometers on cushions exaggerated the impact of the falling subject. However, accelerometers on rigid seats will underestimate such impacts.

Text
SEAT values for shocks AUTHOR ACCEPTED MANUSCRIPT - Accepted Manuscript
Download (1MB)

More information

Accepted/In Press date: 6 August 2018
e-pub ahead of print date: 27 August 2018
Published date: 1 January 2019
Keywords: Biodynamic modelling, Mechanical shocks, Seat vibration

Identifiers

Local EPrints ID: 425463
URI: http://eprints.soton.ac.uk/id/eprint/425463
ISSN: 0003-6870
PURE UUID: e028906b-f66d-4a33-9b83-a873db37efef
ORCID for Michael J. Griffin: ORCID iD orcid.org/0000-0003-0743-9502

Catalogue record

Date deposited: 19 Oct 2018 16:30
Last modified: 07 Oct 2020 06:53

Export record

Altmetrics

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 http://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.

×