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Ergonomic seat with viscoelastic foam reduces shock on underground mobile equipment.

Authors
Mayton-AG; Gallagher-S; Merkel-R
Source
Advances in Occupational Ergonomics and Safety 1997: Proceedings of the Annual International Occupational Ergonomics and Safety Conference, June 1-4, 1997, Washington DC, U.S.A. Das B, Karwowski W, eds., Amsterdam, Netherlands: IOS Press, 1997 Jun; :177-180
Link
NIOSHTIC No.
20023381
Abstract
Operators of underground mobile equipment, particularly shuttle cars, are often exposed to significant levels of whole-body vibration (WBV) and shock. The Human Factors group at the NIOSH-Pittsburgh Research Center has investigated the use of viscoelastic foam to reduce shock for the equipment operator and improve seats on mine shuttle cars. In-mine data were recorded on a JOY 21 SC shuttle car for the original seat and an ergonomic version with viscoelastic foam. A review of the data shows improved isolation across the driver/seat pad interface. For the full-load case, the ergonomic seat decreased transmissibility and isolated the shuttle car operator down to 15 Hz. Additional testing of the foam materials with the development and use of a lumped-parameter analytical model showed different composites of the foam materials can reduce the isolation frequency to below 5 Hz. This paper describes the underground mine trials and the testing done to evaluate properties of the viscoelastic foams. The paper also discusses the development of an analytical model using the data from underground trials and the foam testing.
Keywords
Mining-industry; Mining-equipment; Ergonomics; Underground-mining; Equipment-operators; Vibration; Vibration-control; Vibration-exposure; Vibration-suppressors; Control-technology; Engineering-controls
Publication Date
19970601
Document Type
Conference/Symposia Proceedings
Editors
Das-B; Karwowski-W
Fiscal Year
1997
NTIS Accession No.
NTIS Price
ISBN No.
9789051993493
NIOSH Division
PRC
Source Name
Advances in Occupational Ergonomics and Safety 1997: Proceedings of the Annual International Occupational Ergonomics and Safety Conference, June 1-4, 1997, Washington DC, U.S.A.
State
PA; MI
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