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Human body model response to mechanical impulse

M Jarrah1, W Qassem, M Othman

  • 1Department of Mechanical Engineering, Jordan University of Science and Technology, Irbid, Jordan.

Medical Engineering & Physics
|June 1, 1997
PubMed
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This study models human body impact during falls from standing height. Nonlinear effects significantly alter acceleration transfer and frequency response, particularly at higher input amplitudes, impacting joint health.

Area of Science:

  • Biomechanics
  • Human Body Modeling
  • Impact Dynamics

Background:

  • Falls from standing height are common but their biomechanical impact is understudied.
  • Previous research has not adequately addressed the specific effects of standing height falls on the human body.
  • Understanding impact response is crucial for injury prevention and rehabilitation.

Purpose of the Study:

  • To simulate the impact response of human body segments during falls from standing height.
  • To investigate the influence of nonlinear damping on acceleration transfer and frequency response.
  • To analyze energy dissipation in joints and its relation to potential joint disorders.

Main Methods:

  • Development of lumped parameter linear and nonlinear models of a standing human.

Related Experiment Videos

  • Simulation of impact response to inputs applied at the shoes.
  • Determination of acceleration transfer and frequency response characteristics.
  • Simulation of nonlinear damping effects across varying input amplitudes.

    • Main Results:

    • Nonlinear effects were most pronounced with increased input amplitude, significantly attenuating frequency response.
    • A notable shift in magnitude plots occurred within the 0.1-100 Hz frequency range.
    • Reduced input amplitude made nonlinear effects apparent primarily in the medium frequency range.
    • Simulations showed substantial energy dissipation in joints due to friction, potentially leading to joint disorders, especially at medium frequencies typical of running impacts.

    Conclusions:

    • Nonlinear modeling is essential for accurately simulating impact dynamics in falls from standing height.
    • Significant frequency response attenuation and joint energy dissipation highlight the biomechanical consequences of such falls.
    • The findings suggest a link between medium-frequency impacts and joint disorders, relevant for activities like running.