Research on the Safety of Rear Seat Female Occupant in the 50km/h Frontal Collision

Abstract

In order to improve the safety of rear seat occupant in the 50km/h car frontal collision, the simulation model of the rear occupant restraint system based one car was established by crash simulation software MADYMO and verified by the crash test, studying the effect of the design parameters of the front seat and the safety belt on the various injuries of rear seat female occupant. Results show: 1) head injury criterion HIC15 and occipital stretching moment Myoc have a clear downward trend as the headrest stiffness of the front seat decreases from 70N/mm to 30N/mm, 2) HIC36, Myoc, left femur force Fleft, right femur force Fright and thorax 3ms resultant acceleration T3MS declines by 29.7%, 75.1%, 24.7%, 52.2% and 6.9% respectively as the backrest stiffness of the front seat drops from 84N/m to 36N/mm, 3) HIC36, Myoc, T3MS, Fleft and Fright fall obviously and the variation of D is negligent as the recliner rotational stiffness of the front seat backrest lessens compared to the original value, 4) HIC15, Myoc, T3MS and Fright drops by 18.6%, 24.0%, 6.2% and 11.7% respectively, D arises by 9% as the webbing friction coefficient of the safety belt rises from 0.2 to 0.8, 5) HIC36 and T3MS experience the obvious decline with the decrease of the retractor locking feature of the safety belt, 6) HIC15, Myoc, T3MS and Fright show a significant upward trend and Fleft falls obviously with the forward movement of the buckle location.