Skip directly to search Skip directly to A to Z list Skip directly to page options Skip directly to site content

NIOSHTIC-2 Publications Search

Search Results

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

Authors
Mayton-AG; Gallagher-S; Merkel-R
Source
Holmes Saf Assn Bull 1998 Apr; :12-13
NIOSHTIC No.
20032650
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
19980401
Document Type
Journal Article
Fiscal Year
1998
NTIS Accession No.
NTIS Price
ISSN
0271-3888
NIOSH Division
PRC
Source Name
Holmes Safety Association Bulletin
State
PA; MI
TOP