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The relationships between hand coupling force and vibration biodynamic responses of the hand-arm system.

Authors
  • Pan, Daniel1
  • Xu, Xueyan S1
  • Welcome, Daniel E1
  • McDowell, Thomas W1
  • Warren, Christopher1
  • Wu, John1
  • Dong, Ren G1
  • 1 a Engineering and Control Technology Branch, Health Effects Laboratory Division , National Institute for Occupational Safety and Health , Morgantown , WV , USA.
Type
Published Article
Journal
Ergonomics
Publication Date
Nov 17, 2017
Pages
1–13
Identifiers
DOI: 10.1080/00140139.2017.1398843
PMID: 29086628
Source
Medline
Keywords
License
Unknown

Abstract

This study conducted two series of experiments to investigate the relationships between hand coupling force and biodynamic responses of the hand-arm system. In the first experiment, the vibration transmissibility on the system was measured as a continuous function of grip force while the hand was subjected to discrete sinusoidal excitations. In the second experiment, the biodynamic responses of the system subjected to a broadband random vibration were measured under five levels of grip forces and a combination of grip and push forces. This study found that the transmissibility at each given frequency increased with the increase in the grip force before reaching a maximum level. The transmissibility then tended to plateau or decrease when the grip force was further increased. This threshold force increased with an increase in the vibration frequency. These relationships remained the same for both types of vibrations. The implications of the experimental results are discussed. Practitioner Summary: Shocks and vibrations transmitted to the hand-arm system may cause injuries and disorders of the system. How to take hand coupling force into account in the risk assessment of vibration exposure remains an important issue for further studies. This study is designed and conducted to help resolve this issue.

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