Parameter Study of Biomechanical Quantities in Analytical Neck Models 720957
A parameter study is performed involving several analytical vehicle occupant models in current use, with investigation of neck representations a primary goal. Side, oblique, and rear impact situations are investigated. Attention is given to the effects of varying head-neck mass and moments of inertia, anthropometry, muscle strength, and location, as well as well as strength, of motion-limiting “stops.” A model that replaces the conventional simple ball-joint neck with a two-joint, extensible neck is studied. This model also makes use of joint-stop ellipses to approximate the anatomical range for relatively free angular motion at a joint. Allowance is made for the effect of muscle contraction on occupant dynamics as a function of the degree of voluntary or involuntary tightening of the muscles, based upon experimental findings. A discrete parameter neck model that treats the cervical spine as a linkage of rigid vertebrae and massless, deformable discs is discussed briefly. It is determined that, besides being extensible and having at least two joints, three-dimensional neck representations should account for coupling between the forces resisting the three possible rotational motions-yaw, pitch, and roll-that can occur between the head and the torso.
Citation: Bowman, B. and Robbins, D., "Parameter Study of Biomechanical Quantities in Analytical Neck Models," SAE Technical Paper 720957, 1972, https://doi.org/10.4271/720957. Download Citation
Author(s):
B. M. Bowman, D. H. Robbins
Affiliated:
Highway Safety Research Institute, The University of Michigan
Pages: 31
Event:
16th Stapp Car Crash Conference (1972)
ISSN:
0148-7191
e-ISSN:
2688-3627
Related Topics:
Vehicle occupants
Neck
Torso
Head
Anthropometrics
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