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Biodynamic response of human fingers in a power grip subjected to a random vibration.

Authors
Dong-RG; Welcome-DE; McDowell-TW; Wu-JZ
Source
J Biomech Eng 2004 Aug; 126(4):447-457
NIOSHTIC No.
20025538
Abstract
Knowledge of the biodynamic response (BR) of the human hand-arm system is an important part of the foundation for the measurement and assessment of hand-transmitted vibration exposure. This study investigated the BR of human fingers in a power grip subjected to a random vibration. Ten male subjects were used in the experiment. Each subject applied three coupling actions to a simulated tool handle at three different finger grip force levels. The BR is practically independent of the hand coupling actions for frequencies at or above 100 Hz. Above 50 Hz, the BR is correlated to finger and hand sizes. Increasing the finger coupling force significantly increases the BR. Therefore, hand forces should be measured and used when assessing hand-transmitted vibration exposure. The results also show that under a constant-velocity vibration, the finger vibration power absorption at frequencies above 200 Hz is approximately twice that at frequencies below 100 Hz. This suggests that the frequency weighting specified in the current ISO 5349-1 (2001) may underestimate the high frequency effect on vibration-induced finger disorders.
Keywords
Biodynamics; Hand-injuries; Vibration-exposure; Hand-tools; Exposure-assessment; Demographic-characteristics; Sex-factors; Vibration-effects
Contact
E&CTB/HELD/NIOSH/CDC, 1095 Willowdale Road, MS 2201, Morgantown, WV 26505, USA
CODEN
JBENDY
Publication Date
20040801
Document Type
Journal Article
Email Address
rkd6@cdc.gov
Fiscal Year
2004
NTIS Accession No.
NTIS Price
Issue of Publication
4
ISSN
0148-0731
NIOSH Division
HELD
Priority Area
Disease and Injury: Musculoskeletal Disorders of the Upper Extremities
Source Name
Journal of Biomechanical Engineering
State
WV
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