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Characterisation of the human-seat coupling in response to vibration.

Authors
  • Kim, Eunyeong1
  • Fard, Mohammad1
  • Kato, Kazuhito2
  • 1 a School of Aerospace, Mechanical and Manufacturing Engineering , RMIT University , Melbourne , Australia . , (Australia)
  • 2 b NHK Spring Co. , Ltd. Yokohama , Japan . , (Japan)
Type
Published Article
Journal
Ergonomics
Publication Date
Aug 01, 2017
Volume
60
Issue
8
Pages
1085–1100
Identifiers
DOI: 10.1080/00140139.2016.1252063
PMID: 27780424
Source
Medline
Keywords
License
Unknown

Abstract

Characterising the coupling between the occupant and vehicle seat is necessary to understand the transmission of vehicle seat vibration to the human body. In this study, the vibration characteristics of the human body coupled with a vehicle seat were identified in frequencies up to 100 Hz. Transmissibilities of three volunteers seated on two different vehicle seats were measured under multi-axial random vibration excitation. The results revealed that the human-seat system vibration was dominated by the human body and foam below 10 Hz. Major coupling between the human body and the vehicle seat-structure was observed in the frequency range of 10-60 Hz. There was local coupling of the system dominated by local resonances of seat frame and seat surface above 60 Hz. Moreover, the transmissibility measured on the seat surface between the human and seat foam is suggested to be a good method of capturing human-seat system resonances rather than that measured on the human body in high frequencies above 10 Hz.Practitioner Summary: The coupling characteristics of the combined human body and vehicle seat system has not yet been fully understood in frequencies of 0.5-100 Hz. This study shows the human-seat system has distinctive dynamic coupling characteristics in three different frequency regions: below 10 Hz, 10-60 Hz, and above 60 Hz.

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