Study of Differences in Hybrid III Chest Deflections Due to Three- and Two-Point Belt Loadings

摘要

Parametric studies were performed using the MVMA 2D crash victim simulation program to determine how chest deflection of two-point and three-point belt-restrained Hybrid III type dummies are affected by belt characteristics, seat cushion geometry and stiffness, floor board and knee cushion locations. Output parameters include hip motion, belt loads, chest deflection (top and bottom), knee loads, belt angles and chest g's. Results of the study indicate that chest deflection for comparable belt geometries are larger for two-point belt systems than they are for three-point belt systems, and that in all cases the deflection at the bottom of the chest when restrained by a two-point belt system is significantly larger than at the top of the chest.