Abstract
A series of mathematical models of the interaction between an occupant and the interior of a vehicle is presented. The following parameter studies using an eight-mass, two-dimensional model are discussed: belt material properties, belt slack, belt geometric configuration, and comparison of seats with and without headrests in rear impact. It is shown that a three-mass, three-dimensional is a logical extension of current simulation efforts in order to provide insight into occupant response in oblique and lateral impact as well as non-symmetric restraint systems.