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Human body modelling for traffic accident analysis

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A traffic accident is a complex phenomenon with vehicles and human beings involved. During a collision, the vehicle occupant is exposed to substantial loads, which can cause the occupant injuries that depend on the level of passive safety, as well as on the occupant's individual characteristics. Correct estimation of injury severity demands a validated human body model and known impact conditions. A human body modelling procedure for the purpose of accident analysis is introduced. The occupant body has been modelled as a multibody system with rigid body segments connected. Geometrical and inertial properties of individual body segments were estimated using computed tomography. Frontal impact conditions were simulated on a sled test facility, while the human body dynamic response was measured. Comparison of experimental data and computer simulation revealed an influence of joint resistive properties on the occupant motion in collisions. The difference between measured and simulated response was minimised using optimisation method. Individualised human body modelling procedure enabled better prediction of the occupant motion during vehicle collision and thus more precise estimation of possible injuries in real-life traffic accidents.

Keywords: Biomechanics; Multibody dynamics; Parameter identification; Traffic accident analyses

Document Type: Research Article


Affiliations: 1: Faculty of Mechanical Engineering, University of Ljubljana,CEMEK, Ljubljana, Slovenia 2: Faculty of Medicine, Institute of Anatomy, University of Ljubljana, Ljubljana, Slovenia

Publication date: October 1, 2007


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