Abstract
Vehicle acceleration has a large effect on occupant kinematic behavior and injury risks. In this research, an optimization of vehicle crash pulse was examined to reduce injury measures of rear seat occupants from mathematical simulation. In the optimization, the vehicle crash pulse was improved with the objective function of occupant chest acceleration or deflection. The optimized crash pulse was high acceleration in initial phase, small in the middle phase and high in the final phase. The optimized crash pulse in the final phase was higher in the case of chest acceleration than that of chest deflection due to inertial force of head and upper extremities.
