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A Method for Analyzing Vibration Power Absorption Density in Human Fingertip

Public Domain


Details

  • Personal Author:
  • Description:
    In the current study, we hypothesize that the vibration power absorption density (VPAD) is a good measure for the vibration exposure intensity of the soft tissues of the fingers. In order to calculate the VPAD at a fingertip, we proposed a hybrid modeling approach, which combines a 2D finite element (FE) model with a lumped parameter model. Whereas the lumped components are used to represent the global biodynamic characteristics of the hand-arm system, the FE component is used to predict the detailed stresses, strains, and VPAD in the fingertip. The lumped parameters are determined by using the vibration transmissibilities measured at the fingertip, while the material parameters of the soft and hard tissues of the FE model are adopted from the published experimental data. The proposed model was applied to predict the distributions of dynamic displacement, velocity, and VPAD in the soft tissues of the fingertip. Furthermore, we have derived the frequency weighting based on the VPAD of the soft tissue. The preliminary analysis indicated that the VPAD-based frequency weighting is substantially different from the ISO weighting in that the ISO frequency weighting emphasizes the effect of the vibration at frequencies lower than 25 Hz whereas the VPAD-based weighting generally emphasizes the resonant responses of the finger. Our analysis indicated that the VPAD-based weighting was fairly consistent with the finger surface vibration transmissibility at frequencies greater than the first resonance, suggesting that the finger surface transmissibility may be used as an alternative frequency weighting for assessing the finger vibration exposure. The proposed method provides a practical and efficient tool to simulate the detailed biodynamic responses of a complex biological system to vibration. [Description provided by NIOSH]
  • Subjects:
  • Keywords:
  • ISSN:
    0022-460X
  • Document Type:
    Text
  • Genre:
    Journal Article
  • Place as Subject:
  • CIO:
    National Institute for Occupational Safety and Health (NIOSH)
  • Division:
    HELD - Health Effects Laboratory Division
  • Topic:
    Workplace Safety & Health
  • Location:
    North America
  • Volume:
    329
  • Issue:
    26
  • NIOSHTIC Number:
    nn:20037644
  • Citation:
    J Sound Vib 2010 Dec; 329(26):5600-5614
  • Contact Point Address:
    John Z. Wu, National Institute for Occupational Safety and Health (NIOSH), 1095 Willowdale Road, Morgantown, WV 26505, USA
  • Email:
    jwu@cdc.gov
  • Federal Fiscal Year:
    2011
  • NORA Priority Area:
    Construction
  • Peer Reviewed:
    True
  • Source Full Name:
    Journal of Sound and Vibration
  • Collection(s):
  • Main Document Checksum:
    urn:sha-512:0b9ee50837d8a8b7918b49f22e1211132c53a58abb19d74271d34fd05e164932902d9252b868ae858a779f9a15fff322b1771091a38eb6c75e47f523f0877fd9
  • Download URL:
  • File Type:
    Filetype[PDF - 1.87 MB ]
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