Initial Occupant Kinematics in the High Velocity Vehicle Rollover
Date Published: 1999-09-28
Paper Number:1999-01-3231
DOI: 10.4271/1999-01-3231
Citation:
Howard, R., Hatsell, C., and Raddin, J., "Initial Occupant Kinematics in the High Velocity Vehicle Rollover," SAE Technical Paper 1999-01-3231, 1999, doi:10.4271/1999-01-3231.
Predictions of occupant motion in passenger vehicles undergoing rollovers have been hampered by the uncertainties of the vehicular motion. These uncertainties arise due to a host of factors which may be difficult to quantify, such as trip conditions, vehicle/terrain interaction dynamics and mass eccentricities. In this paper the initial segment of a roll sequence of high angular velocity (greater than 4 radians per second) about a longitudinal axis is examined. The resultant unrestrained motions of the near and far side occupants are studied. To facilitate this analysis a mathematical model has been developed which incorporates dynamic characteristics of the occupant, the vehicle and the terrain surface. The analysis is carried through the first significant vehicle/ground impact following roll initiation. Occupant kinematics are described.
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