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Mathematical models for the apparent masses of standing subjects exposed to vertical whole-body vibration

Mathematical models for the apparent masses of standing subjects exposed to vertical whole-body vibration
Mathematical models for the apparent masses of standing subjects exposed to vertical whole-body vibration
Linear lumped parameter models of the apparent masses of human subjects in standing positions when exposed to vertical whole-body vibration have been developed. Simple models with a single degree-of-freedom (d.o.f.) and with two (d.o.f.) were considered for practical use. Model parameters were optimised using both the mean apparent mass of 12 male subjects and the apparent masses of individual subjects measured in a previous study. The calculated responses of two (d.o.f.) models with a massless support structure showed best agreement with the measured apparent mass and phase, with errors less than 0.1 in the normalised apparent mass (i.e., corresponding to errors less than 10% of the static mass) and errors less than 5° in the phase for a normal standing posture. The model parameters obtained with the mean measured apparent masses of the 12 subjects were similar to the means of the 12 sets of parameters obtained when fitting to the individual apparent masses. It was found that the effects of vibration magnitude and postural changes on the measured apparent mass could be represented by changes to the stiffness and damping in the two (d.o.f.) models.
0022-460X
431-451
Matsumoto, Y.
326c6cca-baec-4a2f-996d-6909570397de
Griffin, M.J.
24112494-9774-40cb-91b7-5b4afe3c41b8
Matsumoto, Y.
326c6cca-baec-4a2f-996d-6909570397de
Griffin, M.J.
24112494-9774-40cb-91b7-5b4afe3c41b8

Matsumoto, Y. and Griffin, M.J. (2003) Mathematical models for the apparent masses of standing subjects exposed to vertical whole-body vibration. Journal of Sound and Vibration, 260 (3), 431-451. (doi:10.1016/S0022-460X(02)00941-0).

Record type: Article

Abstract

Linear lumped parameter models of the apparent masses of human subjects in standing positions when exposed to vertical whole-body vibration have been developed. Simple models with a single degree-of-freedom (d.o.f.) and with two (d.o.f.) were considered for practical use. Model parameters were optimised using both the mean apparent mass of 12 male subjects and the apparent masses of individual subjects measured in a previous study. The calculated responses of two (d.o.f.) models with a massless support structure showed best agreement with the measured apparent mass and phase, with errors less than 0.1 in the normalised apparent mass (i.e., corresponding to errors less than 10% of the static mass) and errors less than 5° in the phase for a normal standing posture. The model parameters obtained with the mean measured apparent masses of the 12 subjects were similar to the means of the 12 sets of parameters obtained when fitting to the individual apparent masses. It was found that the effects of vibration magnitude and postural changes on the measured apparent mass could be represented by changes to the stiffness and damping in the two (d.o.f.) models.

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Published date: 2003
Organisations: Human Sciences Group

Identifiers

Local EPrints ID: 10679
URI: http://eprints.soton.ac.uk/id/eprint/10679
ISSN: 0022-460X
PURE UUID: df4556fb-119b-47f1-8727-abdebbe40007
ORCID for M.J. Griffin: ORCID iD orcid.org/0000-0003-0743-9502

Catalogue record

Date deposited: 16 Jun 2005
Last modified: 15 Mar 2024 05:00

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Contributors

Author: Y. Matsumoto
Author: M.J. Griffin ORCID iD

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